1997

7.4

1951

6.7

1994

5.6

2014

5.8

1956

7.3

1981

7.2

1996

7.2

1999

6.5

1935

6.0

1986

6.0

2001

6.2

1993

6.6

1973

2.0

2009

5.2

1975

5.9

1996

6.2

2000

6.2

1953

7.1

1976

5.3

1947

7.0