2005

6.6

2005

7.1

1998

6.9

1996

6.6

1972

7.1

2002

7.1

1947

6.5

2001

6.2

2006

8.0

2003

7.8

2002

7.3

1962

8.0

1950

8.3

2005

7.1

1992

6.7

2001

6.7

1997

7.6

1989

7.4

2015

7.3

1958

7.7