1976

3.3

1999

4.3

2014

5.2

2016

2.0

2000

4.2

1972

10.0

2002

5.3

1992

6.0

1976

6.5

2005

3.0

2006

5.2

2002

6.8

2005

3.6

1996

4.6

1997

4.7

1991

3.5

1999

5.2

2005

5.9

1971

1.0

1970

4.1