| 1978 | 1979 | 1980 | 1981-1985 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986-1990 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991-1995 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996-2000 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001-2005 | 2001 | 2002 | 2003 | 2004 | 2005 | | 2006 | 2007 | 2008 | 2009 | | |
|
| | | | 18.7 | 10000 | | | 25.2 | 9000 | | | 28.6 | 12000 | | | 295.4 | 94000 | | | 39.4 | 12000 | | | 45.7 | 13000 | | | 50.9 | 14000 | | | 65.7 | 23000 | | | 93.7 | 32000 | | | 492.0 | 280901 | | | 99.0 | 46000 | | | 108.1 | 55000 | | | 120.4 | 67000 | | | 64.5 | 47195 | | | 100.0 | 65706 | | | 919.6 | 735519 | | | 132.0 | 85001 | | | 174.8 | 107286 | | | 202.8 | 124128 | | | 203.0 | 200904 | 6710 | 298.0 | 207.0 | 218200 | 6320 | 352.6 | 1203.3 | 1214800 | 44081 | 2388.4 | 218.9 | 225200 | 7683 | 359.6 | 229.8 | 224800 | 8221 | 391.3 | 220.1 | 238400 | 8731 | 424.5 | 252.4 | 249600 | 9260 | 530.0 | 282.1 | 276800 | 10186 | 683.0 | 1459.7 | 1475000 | 55657 | 4968.7 | 285.8 | 295000 | 11007 | 887.7 | 310.4 | 311000 | 11500 | 930.0 | 185.1 | 190000 | 8700 | 706.0 | 315.5 | 317000 | 11950 | 1145.0 | 362.9 | 362000 | 12500 | 1300.0 | | | | | 390.3 | 402600 | 13200 | 1482.7 | 435.5 | 458000 | 14280 | 1753.6 | 379.0 | 446000 | 14181 | 1907.0 | 412.5 | 436000 | 16257 | 2144.5 | | | | | | | | | |