2016

7.4

2009

6.7

2015

6.5

1985

6.1

1941

8.0

1976

7.5

2006

5.5

2020

6.3

2005

5.2

2003

6.8

2020

6.1

2009

8.2

2013

6.5

1966

8.5

1999

6.6

1966

6.2

1995

7.7

1987

7.7

1996

7.9

1982

7.6