2007

4.1

1952

5.2

1974

7.4

2017

5.9

1941

6.9

2017

4.8

2018

6.6

2011

6.4

1964

7.0

2018

5.8

1986

1.0

2019

6.8

2014

6.9

2010

6.0

1991

5.1

1985

6.2

2001

5.8

1934

6.5

1990

4.8

1972

6.7