Tabella dei dati
| 1988 | 44,5% | 2001 | 51,1% | 2014 | 50,5% |
| 1989 | 43,5% | 2002 | 50,2% | 2015 | 50,7% |
| 1990 | 44,2% | 2003 | 49,9% | 2016 | 49,2% |
| 1991 | 44,9% | 2004 | 49,4% | 2017 | 49% |
| 1992 | 47,1% | 2005 | 49,1% | 2018 | 49,4% |
| 1993 | 49,7% | 2006 | 48,3% | 2019 | 49,6% |
| 1994 | 49,3% | 2007 | 48,2% | 2020 | 49,1% |
| 1995 | 50% | 2008 | 48,8% | 2021 | 50,3% |
| 1996 | 51,6% | 2009 | 49,2% | 2022 | 49,6% |
| 1997 | 50,2% | 2010 | 48,9% | 2023 | 49,6% |
| 1998 | 51,7% | 2011 | 48,9% | 2024 | 50,5% |
| 1999 | 47,9% | 2012 | 49,6% | 2025 | 50,7% |
| 2000 | 48,9% | 2013 | 50,4% | 2026 | 51% |
Tabella dei dati
| 1988 | 52,9 mld | 2001 | 112 mld | 2014 | 167 mld |
| 1989 | 55,4 mld | 2002 | 113 mld | 2015 | 174 mld |
| 1990 | 60,5 mld | 2003 | 115 mld | 2016 | 175 mld |
| 1991 | 65,8 mld | 2004 | 119 mld | 2017 | 180 mld |
| 1992 | 73 mld | 2005 | 124 mld | 2018 | 189 mld |
| 1993 | 79,6 mld | 2006 | 128 mld | 2019 | 196 mld |
| 1994 | 82,8 mld | 2007 | 136 mld | 2020 | 187 mld |
| 1995 | 87,7 mld | 2008 | 143 mld | 2021 | 204 mld |
| 1996 | 93,6 mld | 2009 | 141 mld | 2022 | 223 mld |
| 1997 | 94,2 mld | 2010 | 144 mld | 2023 | 237 mld |
| 1998 | 101 mld | 2011 | 151 mld | 2024 | 250 mld |
| 1999 | 97,2 mld | 2012 | 157 mld | 2025 | 260 mld |
| 2000 | 104 mld | 2013 | 162 mld | 2026 | 270 mld |
Tabella dei dati
| 1988 | 47,8% | 2001 | 51,8% | 2014 | 52,4% |
| 1989 | 46,5% | 2002 | 51,6% | 2015 | 51,2% |
| 1990 | 46,8% | 2003 | 51,8% | 2016 | 50,6% |
| 1991 | 47,9% | 2004 | 54,3% | 2017 | 49,8% |
| 1992 | 49,3% | 2005 | 51,7% | 2018 | 49,2% |
| 1993 | 54,3% | 2006 | 50,9% | 2019 | 49,1% |
| 1994 | 54,3% | 2007 | 49,7% | 2020 | 57,3% |
| 1995 | 56,1% | 2008 | 50,4% | 2021 | 56% |
| 1996 | 55,9% | 2009 | 54,6% | 2022 | 53% |
| 1997 | 52,5% | 2010 | 53,4% | 2023 | 52,2% |
| 1998 | 54,4% | 2011 | 51,3% | 2024 | 55,2% |
| 1999 | 50,5% | 2012 | 51,8% | 2025 | 55,2% |
| 2000 | 50,9% | 2013 | 52,4% | 2026 | 55,2% |
Tabella dei dati
| 1988 | 56,9 mld | 2001 | 114 mld | 2014 | 173 mld |
| 1989 | 59,2 mld | 2002 | 116 mld | 2015 | 175 mld |
| 1990 | 64 mld | 2003 | 119 mld | 2016 | 180 mld |
| 1991 | 70,2 mld | 2004 | 131 mld | 2017 | 183 mld |
| 1992 | 76,3 mld | 2005 | 130 mld | 2018 | 189 mld |
| 1993 | 86,9 mld | 2006 | 135 mld | 2019 | 194 mld |
| 1994 | 91,3 mld | 2007 | 140 mld | 2020 | 218 mld |
| 1995 | 98,6 mld | 2008 | 147 mld | 2021 | 228 mld |
| 1996 | 102 mld | 2009 | 156 mld | 2022 | 238 mld |
| 1997 | 98,7 mld | 2010 | 157 mld | 2023 | 249 mld |
| 1998 | 106 mld | 2011 | 158 mld | 2024 | 273 mld |
| 1999 | 103 mld | 2012 | 164 mld | 2025 | 283 mld |
| 2000 | 108 mld | 2013 | 168 mld | 2026 | 292 mld |