1971

4.0

1986

0.0

1987

5.9

1979

7.0

1959

7.9

2000

7.1

1961

7.3

1963

7.0

1964

7.0

1964

7.0

1990

8.5

2007

7.6

1999

6.7

2007

7.5

2014

6.1

2001

6.3

2021

7.0

1957

7.8

1951

7.7

2001

7.4