Year	Number
1970	14058
1971	14637
1972	15324
1973	16163
1974	17232
1975	18129
1976	19045
1977	19707
1978	20683
1979	21811
1980	23770
1981	23900
1982	24456
1983	25862
1984	26963
1985	27809
1986	29313
1987	31441
1991	36757
1992	37677
1993	44220
1994	50756
1995	43731
1996	43403
1997	45010
1998	47475
1999	47816
2000	58641
2001	65708
2002	68901
2004	73835
2005	75519
2006	77701
2007	80418
2008	84980
2009	95194
2010	98763
2011	100600
2012	100081
2013	105618
2014	105188
2015	98210
2016	108113
2017	116396
2018	116577
2019	116490
2020	109432
2021	114476
2022	116781