6.7

1993

7.7

1997

7.5

2004

7.3

2002

6.5

2013

6.5

2000

6.4

1978

8.4

1989

6.2

1977

4.6

1965

7.6

0.0

2011

6.1

1969

7.2

1993

7.2

2012

0.0

1976

8.0

1998

0.0

2012

0.0

2002

2.0