1973

7.7

1996

5.6

2006

5.5

1988

6.8

1992

6.3

1999

5.5

2003

5.7

2019

4.6

2013

7.0

2014

1.0

1999

5.6

2002

6.0

1976

4.8

2001

5.6

2006

4.8

2010

5.9

2014

0.0

1995

6.9

2004

6.7