2006

6.6

1995

6.5

1990

7.5

2003

5.7

1997

8.4

1997

7.9

2023

8.1

1984

7.7

2016

7.6

1990

7.4

2002

7.6

2013

6.7

1977

8.2

2004

8.4

2010

5.9

2015

7.1

2014

6.3

2007

6.8

1982

8.1

2001

7.9