2006

5.5

2014

8.4

1990

7.4

1989

7.2

1994

8.7

1987

6.9

1994

8.3

2013

6.8

1977

8.2

2010

7.1

2007

7.3

2019

7.8

1992

6.8

2001

7.9

1983

7.9

1992

5.7

2013

8.0

2003

6.3

1998

6.8

2011

6.0