1970

7.2

2005

4.0

1964

7.1

1997

6.1

1991

5.3

2007

4.0

1980

6.6

2002

6.8

2005

5.3

2003

5.9

1969

6.6

1966

5.8

2013

8.5

1996

6.4

1988

6.3

2009

6.6

1970

0.0

1963

7.0

2001

7.3

2016

3.3