2014

8.5

2006

5.8

1980

5.7

1975

1.0

1971

5.3

1984

5.4

1969

5.0

2013

5.5

1997

5.0

1991

5.2

1971

7.1

2006

6.1

2007

6.0

1986

6.1

2003

3.0

1981

6.4

1997

5.3

1992

4.5

1977

7.0

2018

6.0