8.4%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0%
0.5%
1962
0.3%
1963
0.9%
1964
0.7%
1965
0.8%
1966
0.8%
1967
0.7%
1968
0.7%
1969
0.6%
1970
0.7%
1971
0.8%
1972
0.7%
1973
0.9%
1974
1.1%
1975
1.4%
1976
1.7%
1977
2.0%
1978
2.1%
1979
2.4%
1980
2.3%
1981
2.7%
1982
3.4%
1983
3.1%
1984
2.8%
1985
3.3%
1986
3.6%
1987
3.2%
1988
3.6%
1989
4.1%
1990
5.3%
1991
6.5%
1992
6.6%
1993
5.2%
1994
5.5%
1995
5.3%
1996
5.2%
1997
5.3%
1998
4.7%
1999
4.8%
2000
6.6%
2001
6.3%
2002
6.4%
2003
6.3%
2004
6.2%
2005
5.7%
2006
5.5%
2007
6.5%
2008
7.8%
2009
7.3%
2010
7.2%
2011
7.3%
2012
8.0%
2013
8.1%
2014
8.3%
2015
8.1%
2016
8.7%
2017
8.4%
2018
