1995

7.9

1960

6.4

1987

7.1

1998

7.3

2000

7.4

2008

4.5

1992

7.3

1999

5.8

1975

5.8

2005

6.7

1992

8.1

1985

7.0

2019

5.0

2004

5.6

2002

5.3

1988

5.8

1999

6.2

1964

6.8

1945

8.1

1999

7.3