1991

7.7

1981

6.4

2018

6.7

1994

6.4

2009

4.6

1979

5.1

1975

5.5

1987

8.0

1987

0.0

2015

7.0

2017

7.0

1986

4.7

1999

5.3

2011

7.0

1984

0.0

2016

2.0

1974

7.3

2018

10.0

2010

6.0

2016

6.1