1972

7.1

2006

6.5

2016

6.7

2015

6.3

2006

7.4

1993

5.5

2016

6.3

2015

6.6

0.0

2000

5.1

2014

5.3

2008

5.5

1996

7.0

2017

6.0

1978

5.9

1967

6.1

1970

6.3

2001

6.8

7.8