1975

4.0

1978

0.0

1979

7.0

1979

7.4

1950

8.1

1987

7.6

2001

6.9

2006

6.7

1970

7.5

2015

3.0

2020

7.0

2005

7.7

2016

5.2

2006

5.2

1996

6.2

1978

0.0

0.0

2013

5.3

2014

7.0

1982

7.6