1996

6.2

1996

6.6

2011

8.1

2010

7.9

2000

7.6

2002

8.6

2006

7.9

2005

7.9

1987

7.2

1994

7.6

1975

7.3

2022

7.4

2006

8.4

2000

4.5

2012

6.2

2013

7.4

2015

6.1

2014

6.6

2015

7.1

2012

7.3