1959

8.1

1971

4.8

2015

2.5

2009

5.8

1999

5.8

1983

5.1

2007

4.5

1982

5.2

1976

5.6

1972

4.7

2002

6.0

2005

5.3

1972

6.5

1978

5.1

2023

6.6

1972

2.8

1972

3.0

1981

6.3

1983

6.6

1980

4.6