2015

6.2

1976

6.6

2006

6.8

2002

7.1

2001

6.8

1998

6.5

1994

8.3

2007

7.2

2006

6.3

2004

6.4

2006

5.9

2002

6.1

1994

7.3

1996

6.9

2019

6.0

2006

5.0

1997

6.5

2006

6.5

2005

6.5

1999

6.8