2013

6.9

2001

10.0

1983

7.1

2008

8.5

1995

4.6

1968

8.1

1987

7.5

2003

6.5

2010

5.8

1989

7.0

2000

6.4

1990

7.2

1977

6.6

2003

7.0

2000

5.7

1978

7.6

1998

6.6

2000

7.3

1966

6.2

2005

6.3