|
| year | production | consumption |
| 1980 | 99.00 | 99.00 |
| 1981 | 106.00 | 106.00 |
| 1982 | 106.00 | 106.00 |
| 1983 | 102.00 | 102.00 |
| 1984 | 143.00 | 143.00 |
| 1985 | 144.00 | 144.00 |
| 1986 | 144.00 | 144.00 |
| 1987 | 140.00 | 140.00 |
| 1988 | 146.20 | 146.20 |
| 1989 | 145.85 | 145.85 |
| 1990 | 151.00 | 151.00 |
| 1991 | 155.00 | 155.00 |
| 1992 | 150.80 | 150.80 |
| 1993 | 157.00 | 157.00 |
| 1994 | 162.45 | 162.45 |
| 1995 | 160.68 | 160.68 |
| 1996 | 167.39 | 167.39 |
| 1997 | 210.83 | 210.83 |
| 1998 | 221.07 | 221.07 |
| 1999 | 182.93 | 182.93 |
| 2000 | 201.30 | 201.30 |
| 2001 | 215.07 | 215.07 |
| 2002 | 217.54 | 217.54 |
| 2003 | 215.07 | 215.07 |
| 2004 | 218.25 | 218.25 |
| 2005 | 235.55 | 235.55 |
| 2006 | 254.97 | 254.97 |
| 2007 | 269.81 | 266.28 |
| 2008 | 317.84 | 264.86 |
| 2009 | 370.45 | 306.89 |
| 2010 | 397.65 | 320.66 |
| 2011 | 386.70 | 312.18 |
|
|
