| YEAR | REGION | PERCENTAGE |
|---|---|---|
| 1986 | World | 100.0 |
| 1989 | World | 127.65 |
| 1990 | World | 75.09 |
| 1991 | World | 68.67 |
| 1992 | World | 66.03 |
| 1993 | World | 58.9 |
| 1994 | World | 37.76 |
| 1995 | World | 31.27 |
| 1996 | World | 22.5 |
| 1997 | World | 20.73 |
| 1998 | World | 25.97 |
| 1999 | World | 22.09 |
| 2000 | World | 20.21 |
| 2001 | World | 15.97 |
| 2002 | World | 12.5 |
| 2003 | World | 13.1 |
| 2004 | World | 9.71 |
| 2005 | World | 7.11 |
| 2006 | World | 6.64 |
| 2007 | World | 4.72 |
| 2008 | World | 3.34 |
| 2009 | World | 3.75 |
| 2010 | World | 3.36 |
| 2011 | World | 3.09 |
| 2012 | World | 3.39 |
| 2013 | World | 0.22 |
| 1986 | EEA-33 | 100.0 |
| 1989 | EEA-33 | 96.57 |
| 1990 | EEA-33 | 65.74 |
| 1991 | EEA-33 | 58.61 |
| 1992 | EEA-33 | 45.82 |
| 1993 | EEA-33 | 38.08 |
| 1994 | EEA-33 | 18.31 |
| 1995 | EEA-33 | 7.23 |
| 1996 | EEA-33 | 7.76 |
| 1997 | EEA-33 | 6.52 |
| 1998 | EEA-33 | 6.82 |
| 1999 | EEA-33 | 5.38 |
| 2000 | EEA-33 | 3.27 |
| 2001 | EEA-33 | 0.74 |
| 2002 | EEA-33 | -0.96 |
| 2003 | EEA-33 | 1.97 |
| 2004 | EEA-33 | -1.05 |
| 2005 | EEA-33 | -0.4 |
| 2006 | EEA-33 | 0.01 |
| 2007 | EEA-33 | -1.08 |
| 2008 | EEA-33 | -2.24 |
| 2009 | EEA-33 | -0.21 |
| 2010 | EEA-33 | -0.3 |
| 2011 | EEA-33 | -0.48 |
| 2012 | EEA-33 | 0.29 |
| 2013 | EEA-33 | -0.73 |