Mostrar tabla de datos
| 1981 | 41,9% | 1997 | 22,7% | 2013 | 31,2% |
| 1982 | 42,6% | 1998 | 23,9% | 2014 | 28,4% |
| 1983 | 42,8% | 1999 | 23,3% | 2015 | 26,1% |
| 1984 | 43,5% | 2000 | 28,7% | 2016 | 24,4% |
| 1985 | 43,9% | 2001 | 30,9% | 2017 | 28,5% |
| 1986 | 39,2% | 2002 | 30,8% | 2018 | 31,3% |
| 1987 | 39,1% | 2003 | 30,3% | 2019 | 31,8% |
| 1988 | 38% | 2004 | 30,2% | 2020 | 27,9% |
| 1989 | 40,9% | 2005 | 27,5% | 2021 | 32,8% |
| 1990 | 42,3% | 2006 | 33,8% | 2022 | 34,4% |
| 1991 | 39,7% | 2007 | 37,9% | 2023 | 34,6% |
| 1992 | 21% | 2008 | 33,1% | 2024 | 38,9% |
| 1993 | 25% | 2009 | 30,3% | 2025 | 36,3% |
| 1994 | 22,4% | 2010 | 32% | 2026 | 33% |
| 1995 | 21,6% | 2011 | 33,9% | | |
| 1996 | 21,7% | 2012 | 29,8% | | |
Mostrar tabla de datos
| 1981 | 3,72 mil M | 1997 | 212 mil M | 2013 | 5,99 bill. |
| 1982 | 4,18 mil M | 1998 | 226 mil M | 2014 | 6,32 bill. |
| 1983 | 4,48 mil M | 1999 | 252 mil M | 2015 | 5,98 bill. |
| 1984 | 4,68 mil M | 2000 | 351 mil M | 2016 | 5,84 bill. |
| 1985 | 4,92 mil M | 2001 | 429 mil M | 2017 | 7,97 bill. |
| 1986 | 4,36 mil M | 2002 | 477 mil M | 2018 | 10,19 bill. |
| 1987 | 4,54 mil M | 2003 | 554 mil M | 2019 | 12,04 bill. |
| 1988 | 4,68 mil M | 2004 | 713 mil M | 2020 | 10,44 bill. |
| 1989 | 5,24 mil M | 2005 | 838 mil M | 2021 | 14,31 bill. |
| 1990 | 5,3 mil M | 2006 | 1,36 bill. | 2022 | 18,52 bill. |
| 1991 | 8,97 mil M | 2007 | 1,88 bill. | 2023 | 24,39 bill. |
| 1992 | 11,8 mil M | 2008 | 2,17 bill. | 2024 | 31,37 bill. |
| 1993 | 56,8 mil M | 2009 | 1,99 bill. | 2025 | 32,65 bill. |
| 1994 | 85,7 mil M | 2010 | 3,12 bill. | 2026 | 34,16 bill. |
| 1995 | 141 mil M | 2011 | 4,47 bill. | | |
| 1996 | 160 mil M | 2012 | 4,98 bill. | | |
Mostrar tabla de datos
| 1981 | 45% | 1997 | 30,8% | 2013 | 32,2% |
| 1982 | 45,4% | 1998 | 36,2% | 2014 | 32,1% |
| 1983 | 45,9% | 1999 | 33,2% | 2015 | 31,2% |
| 1984 | 47% | 2000 | 34,5% | 2016 | 39,7% |
| 1985 | 47,8% | 2001 | 35,2% | 2017 | 32,2% |
| 1986 | 52% | 2002 | 35,5% | 2018 | 28,4% |
| 1987 | 52,8% | 2003 | 33,7% | 2019 | 30,8% |
| 1988 | 52,4% | 2004 | 31,8% | 2020 | 37,1% |
| 1989 | 52,7% | 2005 | 25,1% | 2021 | 35,9% |
| 1990 | 51,7% | 2006 | 26,2% | 2022 | 33,7% |
| 1991 | 46% | 2007 | 35,3% | 2023 | 31,9% |
| 1992 | 29,1% | 2008 | 37,6% | 2024 | 37,5% |
| 1993 | 38,3% | 2009 | 35,5% | 2025 | 34,6% |
| 1994 | 32,2% | 2010 | 31,6% | 2026 | 33,5% |
| 1995 | 26,6% | 2011 | 37,9% | | |
| 1996 | 28,6% | 2012 | 36,1% | | |
Mostrar tabla de datos
| 1981 | 4 mil M | 1997 | 288 mil M | 2013 | 6,16 bill. |
| 1982 | 4,45 mil M | 1998 | 342 mil M | 2014 | 7,14 bill. |
| 1983 | 4,81 mil M | 1999 | 359 mil M | 2015 | 7,14 bill. |
| 1984 | 5,05 mil M | 2000 | 423 mil M | 2016 | 9,5 bill. |
| 1985 | 5,36 mil M | 2001 | 490 mil M | 2017 | 9,01 bill. |
| 1986 | 5,79 mil M | 2002 | 550 mil M | 2018 | 9,26 bill. |
| 1987 | 6,13 mil M | 2003 | 616 mil M | 2019 | 11,66 bill. |
| 1988 | 6,45 mil M | 2004 | 751 mil M | 2020 | 13,9 bill. |
| 1989 | 6,75 mil M | 2005 | 764 mil M | 2021 | 15,63 bill. |
| 1990 | 6,47 mil M | 2006 | 1,05 bill. | 2022 | 18,16 bill. |
| 1991 | 10,4 mil M | 2007 | 1,75 bill. | 2023 | 22,46 bill. |
| 1992 | 16,3 mil M | 2008 | 2,47 bill. | 2024 | 30,25 bill. |
| 1993 | 87,2 mil M | 2009 | 2,34 bill. | 2025 | 31,12 bill. |
| 1994 | 123 mil M | 2010 | 3,08 bill. | 2026 | 34,72 bill. |
| 1995 | 173 mil M | 2011 | 5 bill. | | |
| 1996 | 211 mil M | 2012 | 6,02 bill. | | |