1996

6.6

2003

7.8

2002

7.1

1990

7.8

2004

7.3

1996

8.0

1989

7.4

2023

0.0

1960

7.5

1984

7.0

1994

8.7

2002

7.0

2000

5.9

2004

6.8

1971

7.6

1930

7.2

1995

6.5

1998

6.7

2005

6.3

2006

6.9