2020

7.4

2011

7.6

2019

7.7

1996

6.5

1968

4.7

1989

6.3

2011

7.1

2017

6.1

2006

6.8

2009

6.6

2011

6.6

2010

6.2

1991

5.7

2017

7.4

1987

5.3

2019

6.6

1986

6.2

1965

6.4

2014

7.6

2008

7.6