1995

6.2

2006

4.6

2000

5.4

2002

5.2

1989

6.1

2007

2.8

2003

5.1

1983

6.0

1994

6.8

1986

6.3

2017

6.7

2001

5.8

2015

5.6

2014

6.2

2001

4.8

2022

0.0

1969

6.0

1973

4.6

1947

4.0

2006

6.0