Year	Number
1960	98599
1961	99104
1962	99891
1963	100859
1964	101965
1965	102701
1966	102945
1967	102925
1968	102709
1969	102382
1970	102535
1971	103081
1972	103477
1973	103805
1974	103999
1975	104941
1976	105480
1977	105773
1978	106707
1979	107538
1980	108347
1981	108801
1982	110788
1983	111878
1984	111410
1985	112980
1986	114608
1987	115196
1988	115907
1989	116808
1990	117851
1991	121078
1992	122390
1993	123694
1994	124941
1995	125890
1996	126717
1997	127697
1998	128635
1999	129514
2000	130452
2001	131629
2002	133002
2003	134408
2004	135940
2005	137511
2006	138750
2007	139782
2008	140528
2009	140797
2010	140461
2011	139877
2012	139952
2013	140879
2014	142713
2015	145147
2016	147520
2017	150626
2018	155077
2019	160458
2020	163233
2021	163357
2022	166028
2023	171433