1985

7.7

1994

7.0

1993

7.8

1996

7.6

1974

5.2

1985

7.5

2018

6.8

2000

6.8

2017

6.1

1967

7.0

2004

6.8

1987

5.7

1973

6.3

1987

6.3

1998

6.7

1962

7.9

1969

5.2

2002

6.2

2000

6.5

1999

7.0