Year	Number
1971	1794
1972	1447
1973	1518
1974	1589
1975	1605
1976	1629
1977	1777
1978	1769
1979	1803
1980	1813
1981	1811
1982	1842
1983	1832
1984	1825
1985	1806
1999	1370
2000	1471
2001	1550
2008	1674
2009	1657
2016	2100
2017	2212
2019	2157
2020	2210
2021	2268
2022	2353