2000

5.7

2005

6.2

1975

6.5

2007

5.6

1995

7.0

1986

6.9

1996

6.9

1962

7.8

2006

7.2

2002

7.6

1985

7.7

2019

5.5

1959

6.8

1971

7.5

2007

8.1

0.0

1979

6.3

2013

0.0

2024

0.0

1966

7.6