2015

4.3

2007

5.9

2002

6.6

1929

6.6

2005

7.0

1998

6.9

1950

8.1

1996

6.6

1999

8.4

1972

7.1

2003

7.8

2002

7.1

1947

6.5

1995

7.4

2001

6.2

2001

7.4

1990

7.8

2006

8.0

1997

7.0

2003

7.8