1975

7.3

1974

5.9

1965

7.2

1996

3.7

2001

6.6

1989

7.0

1974

5.7

1975

6.3

1953

6.0

1967

5.4

2004

6.0

2019

5.0

1997

6.6

1934

0.0

2006

5.9

1977

6.8

1971

7.1

1961

6.9

2011

5.2

2002

6.0