Year	Number
1970	27655.763671875
1971	29140.609375
1972	31374.63671875
1973	30861.337890625
1974	31129.732421875
1975	30539.912109375
1976	30464.98046875
1977	31496.537109375
1978	30709.53125
1979	29552.01953125
1980	30239.880859375
1981	30203.099609375
1982	31117.74609375
1983	33122.12890625
1984	32469.806640625
1985	32426.583984375
1986	32546.4765625
1987	32142.08203125
1988	32663.666015625
1989	33429.4375
1990	32969.41796875
1991	32908.3515625
1992	33408.828125
1993	34409.921875
1994	34311.6484375
1995	34204.953125
1996	34319.3125
1997	34408.27734375
1998	35041.29296875
1999	35929.6328125
2000	36338.12109375
2001	36212.21484375
2002	35898.83203125
2003	36529.5234375
2004	37564.0390625
2005	38002.33984375
2006	39040.4765625
2007	40024.73046875
2008	39556.44140625
2009	40260.265625
2010	40175.24609375
2011	39330.54296875
2012	39269.35546875
2013	39875.33984375
2014	39465.578125
2015	39176.72265625
2016	38919.00390625
2017	38953.46875
2018	37648.28515625
2019	39017.859375
2020	39064.125
2021	38604.27734375
2022	38602.63671875