2001

7.6

2008

8.9

1987

8.4

1992

8.5

1990

6.9

1999

7.9

2007

7.6

1999

7.8

2001

8.0

2019

7.7

1991

7.4

2005

8.1

1997

7.1

1995

7.0

1962

7.2

1988

8.0

1997

7.3

2008

8.1

1960

7.4

1995

7.8