Show data table
| 1980 | 32.6B | 1996 | 123B | 2012 | 217B |
| 1981 | 32.5B | 1997 | 117B | 2013 | 227B |
| 1982 | 30.7B | 1998 | 124B | 2014 | 230B |
| 1983 | 28.3B | 1999 | 128B | 2015 | 199B |
| 1984 | 26B | 2000 | 119B | 2016 | 206B |
| 1985 | 27.2B | 2001 | 122B | 2017 | 221B |
| 1986 | 37.9B | 2002 | 135B | 2018 | 242B |
| 1987 | 47.4B | 2003 | 165B | 2019 | 240B |
| 1988 | 55.4B | 2004 | 189B | 2020 | 229B |
| 1989 | 59.8B | 2005 | 197B | 2021 | 256B |
| 1990 | 79.4B | 2006 | 209B | 2022 | 257B |
| 1991 | 89.9B | 2007 | 241B | 2023 | 292B |
| 1992 | 108B | 2008 | 263B | 2024 | 314B |
| 1993 | 95.1B | 2009 | 244B | 2025 | 346B |
| 1994 | 99.7B | 2010 | 239B | 2026 | 381B |
| 1995 | 118B | 2011 | 245B | | |
Show data table
| 1980 | 8.14B | 1996 | 94.4B | 2012 | 169B |
| 1981 | 9.92B | 1997 | 102B | 2013 | 171B |
| 1982 | 12B | 1998 | 111B | 2014 | 173B |
| 1983 | 15.3B | 1999 | 120B | 2015 | 179B |
| 1984 | 18.8B | 2000 | 128B | 2016 | 186B |
| 1985 | 23.1B | 2001 | 136B | 2017 | 196B |
| 1986 | 28.2B | 2002 | 143B | 2018 | 205B |
| 1987 | 33.3B | 2003 | 146B | 2019 | 214B |
| 1988 | 39.7B | 2004 | 152B | 2020 | 201B |
| 1989 | 46.9B | 2005 | 159B | 2021 | 216B |
| 1990 | 56.4B | 2006 | 166B | 2022 | 244B |
| 1991 | 64.6B | 2007 | 175B | 2023 | 270B |
| 1992 | 72.6B | 2008 | 179B | 2024 | 290B |
| 1993 | 76B | 2009 | 175B | 2025 | 307B |
| 1994 | 82.4B | 2010 | 180B | 2026 | 323B |
| 1995 | 89B | 2011 | 176B | | |
Show data table
| 1980 | 100B | 1996 | 165B | 2012 | 198B |
| 1981 | 104B | 1997 | 173B | 2013 | 196B |
| 1982 | 106B | 1998 | 181B | 2014 | 197B |
| 1983 | 107B | 1999 | 188B | 2015 | 200B |
| 1984 | 106B | 2000 | 195B | 2016 | 204B |
| 1985 | 108B | 2001 | 199B | 2017 | 211B |
| 1986 | 111B | 2002 | 200B | 2018 | 217B |
| 1987 | 120B | 2003 | 198B | 2019 | 223B |
| 1988 | 126B | 2004 | 202B | 2020 | 205B |
| 1989 | 135B | 2005 | 204B | 2021 | 216B |
| 1990 | 145B | 2006 | 207B | 2022 | 232B |
| 1991 | 150B | 2007 | 212B | 2023 | 239B |
| 1992 | 155B | 2008 | 213B | 2024 | 244B |
| 1993 | 154B | 2009 | 206B | 2025 | 249B |
| 1994 | 156B | 2010 | 210B | 2026 | 253B |
| 1995 | 160B | 2011 | 206B | | |