1996

5.0

1970

6.4

1997

6.6

2000

10.0

1964

5.4

2016

7.7

2009

4.8

1987

6.3

2005

2.0

2006

5.9

2001

7.2

1995

6.7

2008

6.6

2007

8.2

2010

5.3

2002

6.3

1989

3.0

2013

5.0

1995

7.3

1973

7.1

1990

7.4

2001

7.6

1999

7.9

1995

4.8

2006

8.0

1995

5.8

1976

8.6

2009

6.7

1998

7.4

2012

6.5

2020

0.0

2004

6.1

1991

7.1

1987

0.0

1999

8.7

2007

5.6