2009

4.8

2012

9.3

2001

5.9

1983

5.8

1999

7.1

2007

10.0

2000

7.1

2004

4.7

1990

7.9

1994

5.7

1968

4.7

1983

7.0

2016

6.5

2007

7.6

1973

6.3

1941

6.9

1966

6.4

1949

7.5

2004

6.6

1992

5.8