1976

7.1

1997

7.5

1967

7.4

1991

7.8

2001

5.8

2002

6.7

1976

8.0

2000

7.0

1969

8.2

1976

7.4

2019

0.0

1997

7.3

1986

7.9

1966

7.4

2001

6.7

1990

10.0

1999

7.7

2003

7.2

1992

0.0

2014

8.5