Year	Number
1971	337729
1972	484088
1973	479616
1981	1328053
1982	1538838
1983	1597081
1984	1504839
1985	1367089
1986	1315531
1987	1294227
1988	1279053
1989	1313689
1990	1276960
1991	1329573
1994	1621685
1995	1703316
1997	1918985
1998	2011772
1999	2127428
2000	2248109
2001	2431142
2002	2728698
2003	2772113
2004	2762882
2005	2695372
2006	2582250
2007	2479644
2008	2340606
2009	2289759
2010	2272527
2011	2191192
2012	2142464
2013	2173384
2014	2073811
2015	2012175
2016	2010673
2017	2022061
2018	2028694
2019	2040257
2020	2165444
2021	2132705
2022	2164738