1975

6.7

1992

6.3

1960

7.3

2002

6.7

1982

6.1

2005

4.1

1997

6.4

1977

6.6

2006

5.1

1975

6.8

1949

7.1

2002

6.5

1984

5.7

2025

0.0

1979

6.7

2008

5.7

1972

6.1

2004

6.6

1960

7.8

2016

4.0