Tabella dei dati
| 1992 | 39,5% | 2002 | 46,8% | 2012 | 28,1% |
| 1993 | 71,4% | 2003 | 64,4% | 2013 | 25,1% |
| 1994 | 59% | 2004 | 49,4% | 2014 | 21,5% |
| 1995 | 58,3% | 2005 | 45,6% | 2015 | 28,3% |
| 1996 | 50,2% | 2006 | 35% | 2016 | 29,5% |
| 1997 | 54,5% | 2007 | 31,4% | 2017 | 36,8% |
| 1998 | 47,6% | 2008 | 31,4% | 2018 | 31,6% |
| 1999 | 46,3% | 2009 | 22,8% | 2019 | 34% |
| 2000 | 59,3% | 2010 | 25,9% | | |
| 2001 | 49,9% | 2011 | 26,7% | | |
Tabella dei dati
| 1992 | 670 mln | 2002 | 3,69 mld | 2012 | 9,74 mld |
| 1993 | 1,4 mld | 2003 | 6,02 mld | 2013 | 7,56 mld |
| 1994 | 1,58 mld | 2004 | 5,85 mld | 2014 | 8,6 mld |
| 1995 | 1,78 mld | 2005 | 5,96 mld | 2015 | 8,76 mld |
| 1996 | 1,85 mld | 2006 | 5,04 mld | 2016 | 9,84 mld |
| 1997 | 2,26 mld | 2007 | 4,92 mld | 2017 | 10,6 mld |
| 1998 | 2,2 mld | 2008 | 4,46 mld | 2018 | 9,55 mld |
| 1999 | 2,32 mld | 2009 | 4,54 mld | 2019 | 10,2 mld |
| 2000 | 3,12 mld | 2010 | 6,34 mld | | |
| 2001 | 3,29 mld | 2011 | 8,49 mld | | |
Tabella dei dati
| 1992 | 32,7% | 2002 | 60,1% | 2012 | 33,3% |
| 1993 | 67,2% | 2003 | 58,1% | 2013 | 32,7% |
| 1994 | 50,4% | 2004 | 57,1% | 2014 | 21,6% |
| 1995 | 81,2% | 2005 | 76,6% | 2015 | 31,1% |
| 1996 | 68,6% | 2006 | 50,5% | 2016 | 30,9% |
| 1997 | 60,1% | 2007 | 51,2% | 2017 | 42,5% |
| 1998 | 88% | 2008 | 69,4% | 2018 | 26,4% |
| 1999 | 106,1% | 2009 | 44,9% | 2019 | 31,3% |
| 2000 | 84,7% | 2010 | 42,4% | | |
| 2001 | 59,5% | 2011 | 32,3% | | |
Tabella dei dati
| 1992 | 554 mln | 2002 | 4,73 mld | 2012 | 11,6 mld |
| 1993 | 1,32 mld | 2003 | 5,44 mld | 2013 | 9,85 mld |
| 1994 | 1,35 mld | 2004 | 6,75 mld | 2014 | 8,65 mld |
| 1995 | 2,48 mld | 2005 | 10 mld | 2015 | 9,62 mld |
| 1996 | 2,53 mld | 2006 | 7,27 mld | 2016 | 10,3 mld |
| 1997 | 2,49 mld | 2007 | 8,03 mld | 2017 | 12,2 mld |
| 1998 | 4,06 mld | 2008 | 9,84 mld | 2018 | 7,97 mld |
| 1999 | 5,31 mld | 2009 | 8,96 mld | 2019 | 9,34 mld |
| 2000 | 4,46 mld | 2010 | 10,4 mld | | |
| 2001 | 3,92 mld | 2011 | 10,2 mld | | |