1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 | 13 200 22 296 31 389 35 504 38 369 39 738 41 703 39 605 50 305 61 945 | 9 166 11 486 12 666 13 745 14 798 15 476 15 488 12 886 15 166 16 514 | 69.44 51.51 40.35 38.72 38.57 38.95 37.14 32.54 30.15 26.66 | 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 | 63 860 66 563 80 552 101 665 141 145 161 088 194 700 209 688 221 844 232 922 | 17 479 14 922 16 101 17 445 24 557 17 127 16 706 14 668 22 910 18 504 | 27.37 22.42 19.99 17.16 17.40 10.63 8.58 6.99 9.88 7.94 |