1980

7.3

1998

6.6

1974

7.9

1988

7.5

1952

8.1

1990

6.3

1997

7.4

1984

7.7

2001

7.8

1983

5.9

1991

7.2

1999

7.1

2007

5.9

2008

6.6

1997

6.5

2015

6.8

2022

10.0

1984

8.1

1994

8.5

1995

7.0