Annual 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