1998

6.8

2014

6.0

2000

6.1

2016

4.7

1929

7.5

2001

6.8

2006

5.9

2005

5.0

1976

6.2

2008

4.9

2009

5.7

2021

6.4

1989

5.9

1990

1.0

1951

5.9

1957

0.0

2015

4.3

2019

6.5

2004

5.8

2008

6.3