1982

6.1

1980

6.5

2015

5.0

2002

5.6

1991

6.1

1996

6.2

2003

5.3

1975

4.0

2006

7.8

2005

6.3

1979

5.6

2023

6.4

1997

6.9

2016

4.6

2008

6.8

2021

6.0

1974

6.6

1994

3.7

2019

0.0

1986

7.2