Show data table
| 1980 | 56.2B | 1996 | 143B | 2012 | 239B |
| 1981 | 51.9B | 1997 | 139B | 2013 | 237B |
| 1982 | 54.1B | 1998 | 140B | 2014 | 234B |
| 1983 | 48.9B | 1999 | 144B | 2015 | 195B |
| 1984 | 47.7B | 2000 | 127B | 2016 | 193B |
| 1985 | 47.3B | 2001 | 132B | 2017 | 200B |
| 1986 | 55.6B | 2002 | 150B | 2018 | 213B |
| 1987 | 64.8B | 2003 | 197B | 2019 | 207B |
| 1988 | 75.4B | 2004 | 235B | 2020 | 191B |
| 1989 | 78.1B | 2005 | 242B | 2021 | 218B |
| 1990 | 96.6B | 2006 | 269B | 2022 | 218B |
| 1991 | 104B | 2007 | 314B | 2023 | 243B |
| 1992 | 115B | 2008 | 351B | 2024 | 256B |
| 1993 | 108B | 2009 | 326B | 2025 | 280B |
| 1994 | 115B | 2010 | 297B | 2026 | 308B |
| 1995 | 135B | 2011 | 283B | | |
Show data table
| 1980 | 7.01B | 1996 | 101B | 2012 | 186B |
| 1981 | 8.39B | 1997 | 111B | 2013 | 178B |
| 1982 | 10.6B | 1998 | 121B | 2014 | 176B |
| 1983 | 12.6B | 1999 | 129B | 2015 | 175B |
| 1984 | 15.7B | 2000 | 136B | 2016 | 174B |
| 1985 | 19.1B | 2001 | 147B | 2017 | 177B |
| 1986 | 22.8B | 2002 | 159B | 2018 | 181B |
| 1987 | 25.7B | 2003 | 174B | 2019 | 185B |
| 1988 | 31.3B | 2004 | 189B | 2020 | 168B |
| 1989 | 37.2B | 2005 | 195B | 2021 | 185B |
| 1990 | 44.9B | 2006 | 214B | 2022 | 207B |
| 1991 | 55.5B | 2007 | 229B | 2023 | 225B |
| 1992 | 64.1B | 2008 | 239B | 2024 | 237B |
| 1993 | 72.2B | 2009 | 234B | 2025 | 248B |
| 1994 | 81.9B | 2010 | 224B | 2026 | 261B |
| 1995 | 91.8B | 2011 | 203B | | |
Show data table
| 1980 | 132B | 1996 | 152B | 2012 | 177B |
| 1981 | 130B | 1997 | 158B | 2013 | 173B |
| 1982 | 128B | 1998 | 163B | 2014 | 175B |
| 1983 | 127B | 1999 | 167B | 2015 | 174B |
| 1984 | 129B | 2000 | 174B | 2016 | 174B |
| 1985 | 133B | 2001 | 182B | 2017 | 177B |
| 1986 | 133B | 2002 | 191B | 2018 | 180B |
| 1987 | 130B | 2003 | 202B | 2019 | 185B |
| 1988 | 136B | 2004 | 213B | 2020 | 168B |
| 1989 | 141B | 2005 | 215B | 2021 | 182B |
| 1990 | 141B | 2006 | 229B | 2022 | 192B |
| 1991 | 145B | 2007 | 237B | 2023 | 196B |
| 1992 | 146B | 2008 | 237B | 2024 | 200B |
| 1993 | 144B | 2009 | 228B | 2025 | 204B |
| 1994 | 147B | 2010 | 215B | 2026 | 208B |
| 1995 | 150B | 2011 | 193B | | |