1948

7.9

2003

6.4

2005

7.0

2006

7.4

1991

7.6

2006

7.6

1969

7.6

2019

6.6

1994

8.5

1997

7.4

1997

7.0

2004

5.6

1995

7.6

1982

7.9

1976

8.1

1987

7.8

1963

8.1

2002

8.4

1999

8.5

2005

7.0