Show data table
| 1980 | 44.6% | 1996 | 100.2% | 2012 | 87% |
| 1981 | 46.1% | 1997 | 95.3% | 2013 | 87.7% |
| 1982 | 51.7% | 1998 | 93.3% | 2014 | 85.8% |
| 1983 | 57.2% | 1999 | 89% | 2015 | 92.3% |
| 1984 | 60.2% | 2000 | 80.4% | 2016 | 92.5% |
| 1985 | 65.2% | 2001 | 81.5% | 2017 | 91% |
| 1986 | 69.3% | 2002 | 79.6% | 2018 | 90.8% |
| 1987 | 69.8% | 2003 | 75.9% | 2019 | 90.1% |
| 1988 | 69.7% | 2004 | 71.9% | 2020 | 118.1% |
| 1989 | 71% | 2005 | 70.6% | 2021 | 112.6% |
| 1990 | 73.7% | 2006 | 69.9% | 2022 | 103.5% |
| 1991 | 81.7% | 2007 | 67.2% | 2023 | 105.1% |
| 1992 | 88.2% | 2008 | 70.4% | 2024 | 110% |
| 1993 | 94.7% | 2009 | 81.8% | 2025 | 113.5% |
| 1994 | 97.5% | 2010 | 84% | 2026 | 110.7% |
| 1995 | 100.1% | 2011 | 84.3% | | |
Show data table
| 1980 | 144B | 1996 | 862B | 2012 | 1.59T |
| 1981 | 170B | 1997 | 864B | 2013 | 1.67T |
| 1982 | 201B | 1998 | 877B | 2014 | 1.71T |
| 1983 | 241B | 1999 | 897B | 2015 | 1.84T |
| 1984 | 278B | 2000 | 890B | 2016 | 1.87T |
| 1985 | 326B | 2001 | 932B | 2017 | 1.95T |
| 1986 | 365B | 2002 | 950B | 2018 | 2.03T |
| 1987 | 401B | 2003 | 953B | 2019 | 2.08T |
| 1988 | 437B | 2004 | 960B | 2020 | 2.62T |
| 1989 | 477B | 2005 | 1T | 2021 | 2.86T |
| 1990 | 513B | 2006 | 1.05T | 2022 | 2.97T |
| 1991 | 573B | 2007 | 1.06T | 2023 | 3.12T |
| 1992 | 634B | 2008 | 1.17T | 2024 | 3.42T |
| 1993 | 708B | 2009 | 1.29T | 2025 | 3.68T |
| 1994 | 772B | 2010 | 1.4T | 2026 | 3.79T |
| 1995 | 832B | 2011 | 1.5T | | |
Show data table
| 1980 | 14.5% | 1996 | 65.9% | 2012 | 28.6% |
| 1981 | 13.6% | 1997 | 61.5% | 2013 | 27% |
| 1982 | 19.2% | 1998 | 57.5% | 2014 | 22.1% |
| 1983 | 25.7% | 1999 | 50.5% | 2015 | 18.9% |
| 1984 | 29.6% | 2000 | 42% | 2016 | 18.2% |
| 1985 | 35.3% | 2001 | 40.3% | 2017 | 12.8% |
| 1986 | 39.6% | 2002 | 38.9% | 2018 | 11.8% |
| 1987 | 39.3% | 2003 | 35.4% | 2019 | 8.7% |
| 1988 | 38.3% | 2004 | 34.6% | 2020 | 16.2% |
| 1989 | 41.4% | 2005 | 29.3% | 2021 | 14.1% |
| 1990 | 43.9% | 2006 | 25% | 2022 | 13.3% |
| 1991 | 50.3% | 2007 | 22.1% | 2023 | 12.7% |
| 1992 | 56.7% | 2008 | 22.8% | 2024 | 10.8% |
| 1993 | 62.1% | 2009 | 26.9% | 2025 | 10.2% |
| 1994 | 66.2% | 2010 | 28.4% | 2026 | 10.3% |
| 1995 | 66.7% | 2011 | 29% | | |
Show data table
| 1980 | 46.7B | 1996 | 566B | 2012 | 523B |
| 1981 | 50B | 1997 | 558B | 2013 | 514B |
| 1982 | 74.7B | 1998 | 540B | 2014 | 441B |
| 1983 | 108B | 1999 | 509B | 2015 | 377B |
| 1984 | 137B | 2000 | 464B | 2016 | 369B |
| 1985 | 176B | 2001 | 461B | 2017 | 274B |
| 1986 | 209B | 2002 | 465B | 2018 | 265B |
| 1987 | 226B | 2003 | 445B | 2019 | 202B |
| 1988 | 240B | 2004 | 462B | 2020 | 361B |
| 1989 | 278B | 2005 | 417B | 2021 | 358B |
| 1990 | 306B | 2006 | 374B | 2022 | 382B |
| 1991 | 353B | 2007 | 349B | 2023 | 378B |
| 1992 | 407B | 2008 | 377B | 2024 | 337B |
| 1993 | 464B | 2009 | 422B | 2025 | 331B |
| 1994 | 524B | 2010 | 473B | 2026 | 354B |
| 1995 | 555B | 2011 | 515B | | |