2008

4.2

1982

8.1

1988

2.5

2001

6.2

2014

5.9

2001

7.0

1986

8.0

2000

6.0

1970

4.5

1999

5.6

2002

6.7

1992

0.0

1964

7.2

2007

6.8

1979

8.1

2015

5.8

1997

6.8

2007

5.2

2001

7.2

1990

6.3