2005

6.8

1995

6.5

1944

7.2

2002

5.3

2001

6.3

2007

7.3

2016

3.9

1970

5.5

1987

6.0

2000

6.1

2000

5.1

1986

6.7

1975

6.8

2004

5.8

2002

6.2

2001

5.9

2004

6.1

1997

6.0

2003

6.6

1993

5.9