2011

5.0

2000

6.7

1961

7.2

1997

7.9

1980

6.2

1975

8.4

2017

8.1

1990

5.8

2003

8.2

1999

8.0

1939

7.9

1999

6.2

2018

6.6

2008

5.1

1989

7.0

1987

8.1

2008

7.6

1995

8.0

2019

7.4

2003

6.3