Year	Number
1971	59401
1972	65573
1978	85974
1979	83711
1980	87755
1981	95604
1982	103821
1983	109937
1984	113561
1985	121496
1986	130338
1987	137353
1988	146310
1989	162341
1990	173044
1992	191431
1996	208786
1997	211558
1998	216066
1999	234189
2000	249547
2001	260738
2002	289263
2004	360016
2005	405899
2006	447425
2008	582101
2010	725208
2011	848030
2012	945792
2013	1025089
2014	1094751
2015	1136477
2019	1149844
2020	1195103
2021	1243408
2022	1286116