Year	Number
1960	32801
1961	34030
1962	35346
1963	36744
1964	38196
1965	39721
1966	41303
1967	42894
1968	44526
1969	46250
1970	48054
1971	49802
1972	51436
1973	53046
1974	54734
1975	56559
1976	58534
1977	60649
1978	62842
1979	65035
1980	67169
1981	69212
1982	71236
1983	73286
1984	75235
1985	77156
1986	79183
1987	81245
1988	83324
1989	85488
1990	87589
1991	89675
1992	91850
1993	93897
1994	95832
1995	97836
1996	99898
1997	101956
1998	104059
1999	106141
2000	108340
2001	110567
2002	112627
2003	114633
2004	116646
2005	118688
2006	120766
2007	122935
2008	125168
2009	127341
2010	129932
2011	132804
2012	135334
2013	137689
2014	139985
2015	142228
2016	144453
2017	146646
2018	148687
2019	150470
2020	151785
2021	152912
2022	154312
2023	155805