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	10	16	10	10	17	7	92
2012	12	11	11	10	16	8	13	10	16	13	12	6	138
2013	11	7	10	10	7	9	14	8	12	14	10	20	132
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	15	13	23	14	26	9	13	15	20	20	7	18	193
2017	30	17	10	20	32	14	17	9	29	19	24	5	226
2018	19	23	8	19	17	21	41	8	17	21	17	18	229
2019	16	26	22	21	22	21	23	15	12	18	29	26	251
2020	16	13	35	6	8	23	13	11	25	28	17	12	207
2021	5	5	13	8	6	10							47

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	25	80
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	3	1		1		52	199
2020			2			72			4	1		1	80
2021	1	56		1	3	2							63

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	8	-9	4	6	15	7	7
2012	11	10	8	10	-35	3	-14	10	16	13	-12	5	25
2013	10	6	10	10	7	-22	14	7	10	14	10	20	96
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	-6	134
2016	15	13	23	14	26	-17	8	13	19	18	6	17	155
2017	30	-16	10	20	32	-9	11	8	27	19	23	3	158
2018	16	20	-37	15	9	-46	33	7	15	19	16	16	83
2019	-39	26	21	18	21	-61	20	14	12	17	29	-26	52
2020	16	13	33	6	8	-49	13	11	21	27	17	11	127
2021	4	-51	13	7	3	8							-16

Number of Members at end of month

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2010	795	799	805	816	824	828	829	828	832	847	860	868
2011	840	840	840	844	845	844	852	843	847	853	868	875
2012	886	896	904	914	879	882	868	878	894	907	895	900
2013	910	916	926	936	943	921	935	942	952	966	976	996
2014	989	1001	1013	1028	1039	1012	1023	1035	1042	1066	1082	1092
2015	1091	1108	1123	1140	1154	1149	1161	1167	1199	1213	1232	1226
2016	1241	1254	1277	1291	1317	1300	1308	1321	1340	1358	1364	1381
2017	1411	1395	1405	1425	1457	1448	1459	1467	1494	1513	1536	1539
2018	1555	1575	1538	1553	1562	1516	1549	1556	1571	1590	1606	1622
2019	1583	1609	1630	1648	1669	1608	1628	1642	1654	1671	1700	1674
2020	1690	1703	1736	1742	1750	1701	1714	1725	1746	1773	1790	1801
2021	1805	1754	1767	1774	1777	1785

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	12							72

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								33

Today is day number 175 of 2021. The predicted total at year-end is 69 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	54	70
2000s	361	431
2010s	1124	1555
2020s	245	1800

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	3	19%	19
1991	4	21%	23
1992	1	4%	24
1993	7	29%	31
1994	1	3%	32
1995	1	3%	33
1996	2	6%	35
1997	6	17%	41
1998	15	37%	56
1999	14	25%	70
2000	19	27%	89
2001	51	57%	140
2002	59	42%	199
2003	27	14%	226
2004	23	10%	249
2005	22	9%	271
2006	37	14%	308
2007	34	11%	342
2008	44	13%	386
2009	43	11%	429
2010	47	11%	476
2011	49	10%	525
2012	76	14%	601
2013	81	13%	682
2014	91	13%	773
2015	132	17%	905
2016	106	12%	1011
2017	138	14%	1149
2018	178	15%	1327
2019	213	16%	1540
2020	198	13%	1738
2021	47	3%	1785

Average year of entry = 2013.19

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	1
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	12
1957	64	18
1958	63	11
1959	62	15
1960	61	16
1961	60	24
1962	59	28
1963	58	19
1964	57	24
1965	56	34
1966	55	30
1967	54	37
1968	53	44
1969	52	36
1970	51	42
1971	50	45
1972	49	48
1973	48	57
1974	47	59
1975	46	45
1976	45	57
1977	44	61
1978	43	49
1979	42	62
1980	41	67
1981	40	66
1982	39	64
1983	38	58
1984	37	55
1985	36	54
1986	35	47
1987	34	52
1988	33	58
1989	32	47
1990	31	50
1991	30	39
1992	29	34
1993	28	40
1994	27	60
1995	26	25
1996	25	37
1997	24	30
1998	23	21
1999	22	17
2000	21	11
2001	20	13
2002	19	14
2003	18	12
2004	17	11
2005	16	6
2006	15	9
2007	14	9
2008	13	5
2009	12	8
2010	11	8
2011	10	10
2012	9	3
2013	8	2
2014	7	1

Average Birthyear = 1980.62
Current Year = 2021.48
Average Age = 40.86