1, 1990 3235860 6.5;
2, 1991 3532651 9.2;
3, 1992 3581540 1.4;
4, 1993 3410447 -4.8;
5, 1994 3468055 1.7;
6, 1995 3345274 -3.5;
7, 1996 337113 14.7;
8, 1997 4218208 9.9;
9, 1998 4106057 -2.7;
10, 1999 4437863 8.1;
11, 2000 4757146 7.2;
12, 2001 4771555 0.3;
13, 2002 5238963 9.8;
14, 2003 5211725 -0.5;
15, 2004 6137905 17.8;
16, 2005 6727926 9.6;
17, 2006 7334077 9.0;
18, 2007 8346969 13.8;
19, 2008 8350835 0.0;
20, 2009 6789936 -18.7;