|
| year | production | consumption |
| 1980 | 15,370.00 | 13,328.00 |
| 1981 | 16,429.99 | 14,440.00 |
| 1982 | 17,679.99 | 15,522.00 |
| 1983 | 18,926.90 | 16,822.00 |
| 1984 | 20,743.99 | 18,512.00 |
| 1985 | 22,706.99 | 20,302.00 |
| 1986 | 24,194.99 | 21,522.00 |
| 1987 | 25,357.99 | 22,462.23 |
| 1988 | 27,192.00 | 24,091.54 |
| 1989 | 28,110.74 | 24,528.57 |
| 1990 | 28,782.00 | 24,961.00 |
| 1991 | 28,623.00 | 25,014.00 |
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