Show data table
| 1980 | 22.6B | 1996 | 69.1B | 2012 | 175B |
| 1981 | 23.5B | 1997 | 68.9B | 2013 | 187B |
| 1982 | 23.2B | 1998 | 56.8B | 2014 | 200B |
| 1983 | 22.5B | 1999 | 58.9B | 2015 | 176B |
| 1984 | 22.4B | 2000 | 54.1B | 2016 | 186B |
| 1985 | 22.5B | 2001 | 53.1B | 2017 | 204B |
| 1986 | 27.4B | 2002 | 62.1B | 2018 | 209B |
| 1987 | 37B | 2003 | 82.4B | 2019 | 211B |
| 1988 | 45.5B | 2004 | 102B | 2020 | 211B |
| 1989 | 44.1B | 2005 | 113B | 2021 | 250B |
| 1990 | 45.7B | 2006 | 110B | 2022 | 245B |
| 1991 | 43.4B | 2007 | 135B | 2023 | 254B |
| 1992 | 41.5B | 2008 | 136B | 2024 | 259B |
| 1993 | 44.8B | 2009 | 122B | 2025 | 259B |
| 1994 | 52.9B | 2010 | 146B | 2026 | 279B |
| 1995 | 62.2B | 2011 | 167B | | |
Show data table
| 1980 | 23.1B | 1996 | 100B | 2012 | 216B |
| 1981 | 27B | 1997 | 104B | 2013 | 228B |
| 1982 | 30.9B | 1998 | 106B | 2014 | 241B |
| 1983 | 33.6B | 1999 | 111B | 2015 | 252B |
| 1984 | 38.7B | 2000 | 118B | 2016 | 267B |
| 1985 | 45.2B | 2001 | 126B | 2017 | 287B |
| 1986 | 52.4B | 2002 | 134B | 2018 | 302B |
| 1987 | 62.4B | 2003 | 142B | 2019 | 320B |
| 1988 | 69.4B | 2004 | 153B | 2020 | 324B |
| 1989 | 73.7B | 2005 | 161B | 2021 | 353B |
| 1990 | 76.6B | 2006 | 169B | 2022 | 386B |
| 1991 | 75.2B | 2007 | 183B | 2023 | 413B |
| 1992 | 77.3B | 2008 | 190B | 2024 | 427B |
| 1993 | 82.9B | 2009 | 192B | 2025 | 445B |
| 1994 | 89.1B | 2010 | 202B | 2026 | 466B |
| 1995 | 94.8B | 2011 | 211B | | |
Show data table
| 1980 | 93.4B | 1996 | 136B | 2012 | 206B |
| 1981 | 96.2B | 1997 | 139B | 2013 | 210B |
| 1982 | 99B | 1998 | 140B | 2014 | 218B |
| 1983 | 98.8B | 1999 | 146B | 2015 | 226B |
| 1984 | 106B | 2000 | 152B | 2016 | 235B |
| 1985 | 107B | 2001 | 156B | 2017 | 243B |
| 1986 | 109B | 2002 | 163B | 2018 | 251B |
| 1987 | 111B | 2003 | 170B | 2019 | 258B |
| 1988 | 112B | 2004 | 179B | 2020 | 255B |
| 1989 | 113B | 2005 | 184B | 2021 | 269B |
| 1990 | 113B | 2006 | 190B | 2022 | 276B |
| 1991 | 111B | 2007 | 196B | 2023 | 282B |
| 1992 | 112B | 2008 | 196B | 2024 | 281B |
| 1993 | 118B | 2009 | 194B | 2025 | 282B |
| 1994 | 124B | 2010 | 197B | 2026 | 288B |
| 1995 | 130B | 2011 | 201B | | |