2009

4.9

0.0

2001

6.9

2015

5.8

2003

7.4

2002

6.6

1990

7.7

1961

7.6

1980

6.6

1982

6.4

1988

7.5

2006

5.8

2001

7.9

1932

7.4

1942

7.8

1974

7.8

2006

7.5

1940

7.9

1983

7.0

1994

6.8