1994

6.8

1988

6.6

1977

6.3

2003

6.1

1980

5.9

1980

7.0

2005

6.4

1998

7.0

2000

6.1

2002

9.0

2007

7.1

1969

7.0

2023

0.0

2001

5.9

2018

5.4

2016

1.0

2011

6.8

2016

7.9

2012

4.7

2016

0.0