1995

7.3

1986

6.8

1994

6.2

1976

7.3

2006

6.1

1985

6.5

1953

7.2

1955

7.2

1961

6.9

1983

7.0

1989

6.3

1999

5.7

1984

0.0

2016

6.0

1991

5.2

1952

7.6

1977

6.0

1990

5.8

1991

6.4

2008

4.8