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 300
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 76,383 76,383
2009 152766
2010 152766 305532
2011 305532 611064
2012 305532 1222128
2013 2444256
2014 611064 1222128 4888512
2015 9777024
2016 1222128 19554048
2017 4888512 38108096
2018 2444256 78216192
2019 156432384
2020 4888512 19554048
2021
2022 9777024
2023 78216192
2024 19554048
2025
2026 39108096 312864768
2027
2028 78216192
2029
2030 156432384