2003

5.7

1993

6.4

2005

6.3

1996

6.3

1995

5.8

1975

4.9

2004

6.1

2003

3.5

2015

6.3

1996

7.0

1971

7.4

1981

7.1

2006

7.5

1991

0.0

2014

3.6

1988

7.8

1993

6.2

1999

3.0

1979

5.6

2007

6.1