Year	Number
1974	21841
1975	22759
1976	25142
1977	27054
1978	29409
1979	31812
1980	31530
1981	31636
1982	32258
1983	35045
1984	36135
1985	34871
1986	37290
1987	46452
1988	53514
1989	45429
1990	45597
1999	52208
2000	55217
2001	55549
2002	59075
2003	65976
2004	67946
2005	72879
2006	83737
2007	91487
2008	99001
2009	99154
2010	112252
2011	115086
2012	124436
2013	134438
2014	143254
2015	146847
2016	147969
2017	163123
2018	167150
2019	187914
2020	207972
2021	195899