2007

7.5

2017

6.9

1997

6.1

1980

6.7

1965

8.0

2001

5.2

1935

7.5

1928

7.8

1999

6.3

1974

6.1

1988

6.3

2012

4.8

2008

5.6

1984

7.1

2014

4.9

1992

7.5

2008

6.9

2001

7.0

2017

4.8