1971 0.092 0.1
1972 1
1973 0.2
1974 0.5
1975 0.4
1976
1977 0.5 0.8
1978
1979 1 1.6
1980
1981 3.2
1982 1.8
1983 6.4
1984 4
1985 11.4 12.8
1986 4
1987 11 25.6
1988
1989 51.2
1990 44
1991 102.4
1992 54
1993 204.8
1994 88
1995 409.6
1996 541
1997 525 819.2
1998
1999 1,354 1638.4
2000 3,561
2001 3276.8
2002 5,935
2003 9,726 6553.6
2004
2005 19,200 13107.2
2006 49,161
2007 26214.4
2008 76,383
2009 52428.8
2010 152766
2011
2012 305,532
2013
2014 611064
2015
2016 1222128
2017
2018 2444256
2019
2020 4888512
2021
2022 9777024
2023
2024 19554048
2025
2026 39108096
2027
2028 78216192
2029
2030 156432384