1990,5.4,5.3,5.2,5.4,5.4,5.2,5.5,5.7,5.9,5.9,6.2,6.3
1991,6.4,6.6,6.8,6.7,6.9,6.9,6.8,6.9,6.9,7,7,7.3
1992,7.3,7.4,7.4,7.4,7.6,7.8,7.7,7.6,7.6,7.3,7.4,7.4
1993,7.3,7.1,7,7.1,7.1,7,6.9,6.8,6.7,6.8,6.6,6.5
1994,6.6,6.6,6.5,6.4,6.1,6.1,6.1,6,5.9,5.8,5.6,5.5
1995,5.6,5.4,5.4,5.8,5.6,5.6,5.7,5.7,5.6,5.5,5.6,5.6
1996,5.6,5.5,5.5,5.6,5.6,5.3,5.5,5.1,5.2,5.2,5.4,5.4
1997,5.3,5.2,5.2,5.1,4.9,5,4.9,4.8,4.9,4.7,4.6,4.7
1998,4.6,4.6,4.7,4.3,4.4,4.5,4.5,4.5,4.6,4.5,4.4,4.4
1999,4.3,4.4,4.2,4.3,4.2,4.3,4.3,4.2,4.2,4.1,4.1,4
2000,4,4.1,4,3.8,4,4,4,4.1,4,3.9,3.9,3.9
2001,4.2,4.2,4.3,4.4,4.3,4.5,4.6,4.9,5,5.4,5.6,5.7
2002,5.6,5.7,5.7,5.9,5.8,5.8,5.8,5.7,5.7,5.7,5.9,6
2003,5.8,5.9,5.8,6,6.1,6.3,6.2,6.1,6.1,6,5.9,5.7
2004,5.6,5.6,5.7,5.6,5.6,5.6,5.5,5.4,5.4,5.5,5.4,5.4 
2005,5.2,5.4,5.2,5.2,5.1,.,.,.,.,.,.,.