1995

9.0

1993

6.9

1964

7.4

1962

6.8

1985

7.4

1985

6.8

2002

7.5

1975

7.4

1987

8.0

1960

7.4

2000

8.5

1988

7.7

1999

7.7

1993

6.8

1989

6.8

1979

5.8

2006

8.1

2012

0.0

2013

7.3

2013

1.0