1982

7.5

1984

6.6

1986

7.2

1989

5.7

1991

7.0

1994

6.5

1996

7.3

1998

6.4

2002

6.3

1983

6.1

1996

6.4

1979

6.5

2023

7.9

1989

7.7

1977

3.1

1977

5.3

2009

4.1

2001

5.1

2023

10.0

1965

5.3