1998

6.6

2001

7.8

2007

6.9

2005

6.2

2003

6.5

1952

5.4

2012

0.0

1976

7.1

2006

3.5

2021

6.7

2018

6.0

2004

6.3

1992

6.8

2020

6.9

2001

7.9

2005

5.5

1999

7.7

1964

7.6

2002

6.3

2019

7.1