1996

7.4

1993

6.7

1995

8.0

1999

7.6

2012

0.0

1994

5.3

2006

7.0

2005

6.9

1976

6.9

2007

10.0

1984

7.2

2011

1.0

1969

4.0

2021

6.8

2014

6.9

2014

6.2

2001

7.4

2002

7.3

2005

6.1

2005

6.7