2011

5.2

1996

6.6

1990

6.0

1972

8.7

2004

8.4

1997

7.9

1997

8.4

1994

8.5

2014

8.5

1977

8.2

2016

7.6

1990

7.5

2009

7.6

1994

8.7

2014

7.7

2006

7.4

2014

7.8

1976

8.1

2006

6.6

2016

7.6