1992

7.4

1990

6.6

2003

7.2

2004

1.0

2016

5.2

2004

4.7

2008

5.3

2005

6.2

1975

3.1

2001

7.5

1979

6.0

2006

5.2

1968

5.5

1974

7.5

1969

5.1

2010

0.0

2001

6.4

1970

4.1

1982

6.0

1961

4.6