1982

7.9

2006

6.0

1987

7.8

2000

7.4

2019

6.6

1991

7.0

1994

6.2

2002

7.3

1959

8.0

1984

7.7

2005

6.4

1959

8.1

1997

6.8

1971

6.8

1967

7.5

1992

8.1

2006

5.9

1964

7.1

1980

7.7

1999

3.0