Year	Number
1970	9529.0322265625
1971	9798.3603515625
1972	10279.6787109375
1973	10109.826171875
1974	10229.177734375
1975	10467.9833984375
1976	10546.7568359375
1977	10593.4736328125
1978	10787.9677734375
1979	10814.8837890625
1980	10851.8427734375
1981	10784.603515625
1982	11036.6279296875
1983	11308.0888671875
1984	11563.65234375
1985	11586.7255859375
1986	12115.5732421875
1987	12337.6064453125
1988	12572.8564453125
1989	12819.53125
1990	12919.501953125
1991	12869.49609375
1992	12981.6826171875
1993	13089.4619140625
1994	13363.6474609375
1995	13791.81640625
1996	13622.6669921875
1997	13965.3525390625
1998	13953.0849609375
1999	13513.0859375
2000	12982.5078125
2001	13417.19140625
2002	13552.31640625
2003	13666.513671875
2004	13952.3955078125
2005	13922.392578125
2006	13857.7265625
2007	13671.779296875
2008	13959.328125
2009	13884.1298828125
2010	14119.474609375
2011	14169.1533203125
2012	14714.896484375
2013	14625.1904296875
2014	15058.408203125
2015	14289.640625
2016	14766.3837890625
2017	15256.8916015625
2018	15770.5048828125
2019	16621.162109375
2020	16531.86328125
2021	16781.50390625