Year | Frequency (n) | Frequency (%) | Cumulative frequency (%) |
---|---|---|---|
< 1900 | 16 | 3.4 | 3.4 |
1930–1940 | 2 | 0.4 | 3.8 |
1941–1950 | 1 | 0.2 | 4.0 |
1951–1960 | 8 | 1.7 | 5.7 |
1961–1970 | 6 | 1.3 | 7.0 |
1971–1980 | 7 | 1.5 | 8.5 |
1981–1990 | 4 | 0.9 | 9.4 |
1991–2000 | 64 | 13.6 | 23.0 |
2001–2010 | 111 | 23.6 | 46.6 |
2011–2020 | 251 | 53.4 | 100 |