1998

6.2

2011

7.2

2005

9.9

2006

9.8

2004

9.5

2023

10.0

1975

4.5

6.1

2009

5.8

1972

7.4

2006

6.3

1963

2.7

1940

6.0

2018

6.7

2000

6.9

2015

5.5

2004

10.0

1984

9.2