| Fecha | Miles de toneladas | Variac. año anterior | Variac. período anterior | ||
|---|---|---|---|---|---|
| % | Valor | % | Valor | ||
| 1981 1 | 741,0 | -6,2 | -49,0 | -44,7 | -598,0 |
| 1980 12 | 1.339,0 | 9,8 | 119,0 | ||
| 1980 11 | 1.220,0 | 9,2 | 103,0 | ||
| 1980 10 | 1.117,0 | 3,5 | 38,0 | ||
| 1980 9 | 1.079,0 | 29,2 | 244,0 | ||
| 1980 8 | 835,0 | -23,8 | -261,0 | ||
| 1980 7 | 1.096,0 | 27,6 | 237,0 | ||
| 1980 6 | 859,0 | -18,8 | -199,0 | ||
| 1980 5 | 1.058,0 | 7,0 | 69,0 | ||
| 1980 4 | 989,0 | 1,8 | 17,0 | ||
| 1980 3 | 972,0 | 5,8 | 53,0 | ||
| 1980 2 | 919,0 | 16,3 | 129,0 | ||
| 1980 1 | 790,0 | ||||