2015

7.4

7.8

2001

7.4

2008

8.0

2010

6.8

1978

5.9

1971

6.7

1999

5.9

1982

5.2

1966

6.1

2014

7.0

2012

8.5

2002

5.8

2017

6.5

1934

6.9

2020

7.3

2019

6.5

1961

6.7

2021

5.7

2006

7.2