2014

6.1

1992

7.4

2006

6.5

1978

6.4

1977

6.8

1990

6.0

2004

6.7

2019

7.0

2007

6.2

1995

6.5

2004

5.9

2000

6.0

2009

6.2

2008

6.0

2007

7.6

1977

6.2

2007

7.0

1989

7.3

1995

6.3

2009

6.6