2014

7.5

1998

5.1

2019

7.6

2012

6.6

2011

7.4

2019

6.7

1968

6.5

1991

6.7

2018

7.0

1987

6.5

1935

6.5

2013

9.4

2007

4.7

1972

6.3

1975

6.1

1997

5.4

1989

5.6

2017

6.9

1935

6.4

1980

5.3