1980

6.7

2005

6.6

2009

7.4

1895

5.4

1995

6.8

1966

8.5

1989

5.1

1960

7.5

2016

5.9

2000

7.2

2008

6.0

1965

8.0

1985

6.2

1980

6.6

2001

6.2

2009

7.9

1991

8.3

2008

6.8

2004

7.8

1982

7.8