1958

7.4

1996

6.9

1993

5.3

2009

6.5

1995

5.1

2000

6.5

1963

7.7

1991

5.4

2006

5.5

2013

5.8

2017

4.5

2008

7.4

2005

7.3

2006

5.9

2005

5.0

2019

4.1

2005

5.7

1998

6.2

1985

7.2

2015

5.8