1990

7.2

1984

4.5

1979

3.7

2021

6.5

2018

6.9

1993

5.2

1984

7.7

1985

5.7

1989

6.7

1983

5.8

1974

6.3

1996

3.5

2002

7.4

1983

6.7

1993

5.7

2004

4.8

2003

5.0

1984

6.5

2008

6.0

1985

5.9

1982

8.0

1983

6.4

2008

7.2

1982

6.0

2002

6.8

1989

5.0