2008

5.8

2005

6.6

2005

6.1

2005

4.9

1950

6.7

1979

6.2

1980

6.2

1981

1.0

2015

5.9

1975

3.1

2016

6.4

2000

5.0

1992

6.0

1991

7.1

1994

7.4

1991

6.5

2016

6.0

1971

4.8

1993

6.8

2007

7.1