2013

6.2

2016

6.5

2003

6.3

1994

6.7

1975

6.8

1980

6.4

1988

6.2

1966

6.2

2019

7.0

2014

6.7

2006

6.1

1998

6.0

2005

5.2

1920

7.3

2003

6.6

1975

6.4

1993

6.2

1985

5.3

1991

6.2

2015

6.1