1986

5.9

1995

6.7

1965

7.2

1994

5.6

2013

6.7

2010

5.5

2011

6.2

2006

6.0

1976

7.3

2025

6.4

1999

5.1

1979

6.6

2003

7.2

1980

6.7

1990

7.0

1983

6.5

1972

7.1

2003

7.1

1990

6.3

1991

6.8