2016

7.1

2006

6.6

2010

7.7

2011

6.3

2016

7.2

1989

6.0

2019

6.2

1969

6.7

2021

7.5

2011

5.5

1976

6.6

1966

6.1

2008

5.8

1986

5.8

1989

5.7

2015

7.0

1943

6.8

2018

5.6