Mensa Switzerland The High IQ Society

The following tables display how many members have joined or quit Mensa in each month.

Entries by month

Year of Entry	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year Total
2010	3	4	6	11	8	18	7	4	9	16	15	11	112
2011	12	3		4	1	2	11	16	10	10	17	7	93
2012	12	11	11	10	16	8	14	10	16	13	12	6	139
2013	11	7	10	10	7	9	14	8	12	14	10	19	131
2014	10	12	12	15	11	6	11	12	8	24	16	10	147
2015	20	17	15	17	15	14	14	9	35	17	22	19	214
2016	16	13	23	14	26	9	13	15	20	20	7	18	194
2017	30	17	10	20	32	14	17	9	29	19	24	5	226
2018	19	23	8	19	17	22	40	8	17	21	17	18	229
2019	18	27	24	21	23	21	27	15	13	19	30	26	264
2020	16	13	36	7	10	23	13	11	26	28	17	13	213
2021	5	5	13	8	6	14	16	4	14				85

Exits by month

Year of Exit	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year Total
2010						14	6	5	5	1	2	3	36
2011	40	3				3	2	25	6	4	2		85
2012	1	1	3		51	5	27				24	1	113
2013	1	1				31		1	2				36
2014	17					33			1				51
2015	21				1	19	2	3	3	3	3	24	79
2016						26	5	2	1	2	1	1	38
2017		33				23	6	1	2		1	2	68
2018	3	3	45	4	8	67	8	1	2	2	1	2	146
2019	55		1	3	1	82	2	1		1		51	197
2020			2			72			4	1		1	80
2021	1	56		1	3	64	11	3					139

Resulting Balance

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year Total
2010	3	4	6	11	8	4	1	-1	4	15	13	8	76
2011	-28			4	1	-1	9	-9	4	6	15	7	8
2012	11	10	8	10	-35	3	-13	10	16	13	-12	5	26
2013	10	6	10	10	7	-22	14	7	10	14	10	19	95
2014	-7	12	12	15	11	-27	11	12	7	24	16	10	96
2015	-1	17	15	17	14	-5	12	6	32	14	19	-5	135
2016	16	13	23	14	26	-17	8	13	19	18	6	17	156
2017	30	-16	10	20	32	-9	11	8	27	19	23	3	158
2018	16	20	-37	15	9	-45	32	7	15	19	16	16	83
2019	-37	27	23	18	22	-61	25	14	13	18	30	-25	67
2020	16	13	34	7	10	-49	13	11	22	27	17	12	133
2021	4	-51	13	7	3	-50	5	1	14				-54

Number of Members at end of month

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2010	793	797	803	814	822	826	827	826	830	845	858	866
2011	838	838	838	842	843	842	851	842	846	852	867	874
2012	885	895	903	913	878	881	868	878	894	907	895	900
2013	910	916	926	936	943	921	935	942	952	966	976	995
2014	988	1000	1012	1027	1038	1011	1022	1034	1041	1065	1081	1091
2015	1090	1107	1122	1139	1153	1148	1160	1166	1198	1212	1231	1226
2016	1242	1255	1278	1292	1318	1301	1309	1322	1341	1359	1365	1382
2017	1412	1396	1406	1426	1458	1449	1460	1468	1495	1514	1537	1540
2018	1556	1576	1539	1554	1563	1518	1550	1557	1572	1591	1607	1623
2019	1586	1613	1636	1654	1676	1615	1640	1654	1667	1685	1715	1690
2020	1706	1719	1753	1760	1770	1721	1734	1745	1767	1794	1811	1823
2021	1827	1776	1789	1796	1799	1749	1754	1755	1769

peter.diehl marica.virag matthias.stumm jessica.krestyn

The following table shows the event activity by month by counting the signups for all Mensa events in each month.

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year Total
2010								18	39	96	45	55	253
2011	80	74	26	16	78	65	42	64	82	145	100	107	879
2012	55	57	62	61	94	88	69	179	75	76	95	83	994
2013	123	54	65	73	46	38	66	114	69	62	77	31	818
2014	110	54	50	39	59	24	89	151	72	61	59	62	830
2015	79	46	72	39	55	63	58	83	155	79	58	83	870
2016	108	107	76	104	73	76	86	179	143	66	101	94	1213
2017	94	142	128	86	117	129	135	75	66	74	65	86	1197
2018	117	54	97	120	116	93	105	116	127	118	99	60	1222
2019	115	107	153	138	103	98	83	110	101	155	134	102	1399
2020	330	178	56	5	28	60	96	119	80	35	37	6	1030
2021	1	17	15	2	25	29	83	99	103				374

The following table displays the number of forum posts by month. As you can guess from the numbers, the website was launched in August 2010. Forum activity reached an all-time high in January 2011 with 2'217 posts. The most active single day was March 23rd 2011 with 167 posts. In general, forum activity has been declining in the last years, reaching an all-time low in March 2020 with 3 posts.

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year Total
2010	2	4	1	7		2		255	613	450	344	613	2291
2011	2217	1176	1095	555	645	534	222	250	479	1268	955	805	10201
2012	605	385	651	839	825	443	404	579	783	924	777	309	7524
2013	370	541	653	425	572	368	174	305	177	399	217	173	4374
2014	340	342	250	338	390	241	278	250	335	250	358	231	3603
2015	370	169	298	211	165	174	167	163	244	107	390	48	2506
2016	161	170	149	108	64	67	71	54	50	20	148	77	1139
2017	101	59	64	46	43	12	88	32	118	58	65	31	717
2018	45	26	57	20	16	12	16	33	13	33	57	68	396
2019	14	10	48	45	14	46	26	14	12	18	24	6	277
2020	39	12	3	8	5	7	3	6	6	15	6	7	117
2021	20	6	3	3	1		13	6	1				53

Today is day number 271 of 2021. The predicted total at year-end is 71 posts.

The following table displays the distribution of our members by decade of entry into Mensa Switzerland.

Decade of Entry	Number of Members who joined in that decade	Cumulative
1960s	3	3
1970s	5	8
1980s	8	16
1990s	53	69
2000s	353	422
2010s	1086	1508
2020s	277	1785

As the table shows, although Mensa Switzerland was founded as early as 1965, the majority of our members joined just recently in the 2010s, and more than 90% joined after the turn of the millennium.

The following table displays the distribution of our members by year of entry into Mensa. Please note that the actual number of members that Mensa Switzerland had in these years is higher, because in this table only members who are still members today are counted. Nevertheless, the numbers can give you some indication of the speed at which Mensa Switzerland was growing at various times. In percentage terms, Mensa Switzerland underwent a particularly rapid expansion in the five years from 1998 to 2002.

Year of Entry	Number of Members who joined in that year	Growth in %	Cumulative
1965	2		2
1966	1	50%	3
1972	1	33%	4
1975	2	50%	6
1977	2	33%	8
1981	4	50%	12
1982	1	8%	13
1983	2	15%	15
1986	1	7%	16
1990	2	13%	18
1991	4	22%	22
1992	1	5%	23
1993	7	30%	30
1994	1	3%	31
1995	1	3%	32
1996	2	6%	34
1997	6	18%	40
1998	15	38%	55
1999	14	25%	69
2000	19	28%	88
2001	50	57%	138
2002	59	43%	197
2003	27	14%	224
2004	23	10%	247
2005	22	9%	269
2006	37	14%	306
2007	33	11%	339
2008	44	13%	383
2009	38	10%	421
2010	47	11%	468
2011	48	10%	516
2012	75	15%	591
2013	79	13%	670
2014	89	13%	759
2015	126	17%	885
2016	99	11%	984
2017	133	14%	1117
2018	172	15%	1289
2019	203	16%	1492
2020	191	13%	1683
2021	85	5%	1768

Average year of entry = 2013.29

The following table displays the age distribution of our members by birthyear.

Birthyear	Age	Number of Members
1928	93	2
1929	92
1930	91
1931	90
1932	89
1933	88
1934	87	1
1935	86
1936	85
1937	84
1938	83	1
1939	82
1940	81	2
1941	80	1
1942	79	2
1943	78
1944	77
1945	76	3
1946	75
1947	74	3
1948	73	2
1949	72	2
1950	71	3
1951	70	5
1952	69	3
1953	68	4
1954	67	10
1955	66	13
1956	65	11
1957	64	17
1958	63	11
1959	62	13
1960	61	16
1961	60	24
1962	59	28
1963	58	19
1964	57	24
1965	56	33
1966	55	30
1967	54	39
1968	53	43
1969	52	36
1970	51	43
1971	50	42
1972	49	47
1973	48	56
1974	47	56
1975	46	46
1976	45	57
1977	44	59
1978	43	48
1979	42	59
1980	41	65
1981	40	64
1982	39	62
1983	38	58
1984	37	54
1985	36	53
1986	35	46
1987	34	49
1988	33	56
1989	32	49
1990	31	51
1991	30	36
1992	29	34
1993	28	40
1994	27	57
1995	26	25
1996	25	36
1997	24	29
1998	23	20
1999	22	20
2000	21	11
2001	20	13
2002	19	13
2003	18	13
2004	17	12
2005	16	7
2006	15	9
2007	14	10
2008	13	5
2009	12	8
2010	11	8
2011	10	12
2012	9	5
2013	8	2
2014	7	1

Average Birthyear = 1980.77
Current Year = 2021.74
Average Age = 40.97