2007

4.3

2018

6.4

1998

6.2

1999

6.1

1990

5.8

1969

7.3

1972

7.5

1971

7.4

1994

6.0

2010

6.3

2006

5.4

2005

7.1

1971

7.5

1974

0.0

2007

7.3

2013

7.4

1974

7.7

1975

6.4

2006

6.5

2014

6.6