Year	Number
1971	73846
1972	76907
1975	96947
1976	106960
1977	110634
1978	121962
1979	118077
1980	120281
1981	123817
1982	128467
1983	141613
1984	154759
1985	155140
1987	170449
1989	172799
1990	188281
2003	237224
2004	246570
2005	294716
2012	444439
2013	483738
2014	527388
2015	571685
2016	590003
2017	646318
2018	654895
2019	1354579
2021	1389336