Year	Number
1960	68038
1961	68705
1962	69520
1963	70272
1964	70992
1965	71730
1966	72567
1967	73564
1968	74739
1969	76059
1970	77583
1971	79226
1972	80835
1973	82472
1974	84189
1975	86037
1976	88078
1977	90299
1978	92659
1979	95017
1980	97210
1981	99170
1982	100931
1983	102650
1984	104497
1985	106607
1986	108966
1987	111610
1988	114513
1989	117445
1990	120343
1991	123084
1992	125648
1993	128182
1994	130666
1995	133077
1996	135412
1997	137656
1998	139790
1999	141808
2000	143714
2001	146258
2002	149841
2003	153762
2004	157697
2005	161680
2006	165725
2007	169845
2008	174004
2009	178128
2010	182138
2011	186044
2012	189924
2013	193757
2014	197497
2015	201124
2016	204632
2017	208036
2018	211344
2019	214599
2020	218641
2021	223107
2022	227380
2023	231856