2007

5.5

2000

6.3

2019

6.7

1992

6.9

2011

6.9

1989

6.7

1983

7.1

1992

7.1

1990

6.5

2012

5.3

2006

6.7

2006

6.1

1991

6.5

1987

5.3

1992

7.0

2017

6.6

2009

7.0

1989

5.9

2011

6.6

2001

5.8