|
| year | production | consumption |
| 1980 | 30,877.95 | 34,073.55 |
| 1981 | 38,308.63 | 45,245.47 |
| 1982 | 43,326.35 | 50,081.31 |
| 1983 | 44,040.64 | 52,697.10 |
| 1984 | 43,642.71 | 52,113.97 |
| 1985 | 43,720.98 | 53,695.79 |
| 1986 | 42,240.57 | 51,971.78 |
| 1987 | 38,130.05 | 50,333.74 |
| 1988 | 35,097.59 | 42,279.15 |
| 1989 | 40,180.35 | 53,343.05 |
| 1990 | 39,179.45 | 51,630.06 |
| 1991 | 36,866.80 | 52,481.01 |
| 1992 | 36,816.10 | 52,225.31 |
| 1993 | 34,727.22 | 48,995.54 |
| 1994 | 32,577.71 | 47,526.15 |
| 1995 | 31,132.58 | 47,590.09 |
| 1996 | 29,684.14 | 40,482.38 |
| 1997 | 29,145.11 | 45,212.40 |
| 1998 | 28,797.88 | 43,727.59 |
| 1999 | 26,767.43 | 47,794.02 |
| 2000 | 25,872.35 | 49,721.96 |
| 2001 | 24,998.22 | 45,634.59 |
| 2002 | 24,288.33 | 50,532.16 |
| 2003 | 22,665.73 | 46,675.17 |
| 2004 | 22,583.05 | 49,592.99 |
| 2005 | 21,474.13 | 48,350.68 |
| 2006 | 20,334.34 | 42,539.30 |
| 2007 | 18,939.91 | 46,144.96 |
| 2008 | 11,229.25 | 28,553.17 |
| 2009 | 10,411.33 | 21,487.36 |
| 2010 | 9,292.48 | 15,929.50 |
| 2011 | 7,298.40 | 25,481.03 |
|
|
