Year	Number
1970	34100
1971	39800
1972	44500
1973	48500
1974	38000
1975	42600
1976	50600
1977	49400
1978	55600
1979	57300
1980	50300
1981	49700
1982	53900
1983	58800
1984	71600
1985	77000
1986	75800
1987	78600
1988	79200
1989	80100
1990	79600
1991	69800
1992	79200
1993	86200
1994	86600
1995	89200
1996	92400
1997	94200
1998	90700
1999	94100
2000	108584
2001	125269
2002	113247
2003	114100
2004	137676
2005	130515
2006	133226
2007	137697
2008	128287
2009	112671
2010	136382.257932753
2011	125477.119829729
2012	111870
2013	103800
2014	134160
2015	124014
2016	128454
2017	135281
2018	144040
2019	151848
2020	75393
2021	108338