1973

7.6

2006

7.7

2014

6.3

2007

7.9

1892

3.7

1992

6.5

2018

6.7

2006

6.1

2003

7.4

1968

6.9

1985

6.5

1986

6.8

1994

6.2

1976

7.3

2012

6.7

1967

6.4

1989

6.3

2011

7.3

2005

6.4

2003

6.9