2007

7.0

2014

7.1

1975

6.8

1988

6.7

1997

6.5

1986

6.2

1997

6.2

1990

5.8

2003

6.1

1927

0.0

1987

7.3

1969

5.2

1960

6.0

1980

8.3

1988

7.2

2003

6.3

1964

7.4

1967

6.6

1967

6.5

2020

0.0