2015

5.9

1963

7.1

1967

6.6

1974

6.4

1981

6.5

1994

8.3

2005

6.7

2006

7.5

2004

7.2

2007

6.1

1995

6.0

1991

6.8

1993

7.0

1996

6.2

1997

6.6

1998

6.3

2017

6.9

1994

6.8

2007

5.1

1993

6.2