Year	Number
1972	1364
1973	1481
1974	1549
1975	1561
1976	1587
1977	1718
1978	1719
1979	1761
1980	1771
1981	1770
1982	1794
1983	1764
1984	1749
1985	1749
1997	1781
1999	1370
2000	1471
2001	1550
2008	1674
2009	1657
2016	2100
2017	2212