1987

7.3

1991

7.6

1973

7.0

2000

8.1

1993

7.9

1980

7.1

2016

6.5

1988

6.9

1979

7.5

2006

6.4

1995

6.9

1987

6.4

1992

0.0

1979

7.3

1995

6.7

2002

6.4

2006

6.5

1996

6.9

1983

7.4

1993

7.5