2000

6.4

2002

6.5

1977

4.6

1994

10.0

2004

7.3

1950

7.0

1978

8.4

1997

7.4

1969

7.1

6.3

1993

7.4

1989

6.2

2012

0.0

0.0

1976

8.0

2011

6.1

1996

8.3

1946

0.0

2013

6.0

1984

5.0