1989

7.8

1956

7.1

1984

7.1

2005

5.8

1968

6.5

1979

6.8

1985

6.8

1992

5.3

1976

7.3

1969

6.9

1955

7.0

2016

0.0

2008

5.7

1973

7.9

1962

5.4

2009

6.3

2008

7.3

1982

4.5

2001

6.0

2003

3.4