1981

7.2

2009

6.8

2005

6.2

1999

5.3

2006

5.8

1995

7.2

2003

6.6

2002

7.6

1999

5.8

1939

3.7

2013

6.9

1942

7.5

2017

6.5

1999

6.0

2014

6.5

1943

5.4

2007

5.6

2014

6.0

2022

0.0

1979

7.6