1965

6.8

2003

8.6

1966

6.2

1964

7.0

1931

5.8

2008

5.9

2018

6.7

2004

7.0

2013

7.6

2014

7.3

1973

7.2

2016

6.4

2021

7.3

1958

4.9

2016

5.7

2015

6.3

2015

6.2

2019

5.8

1942

5.7

2014

5.7