1999

7.5

2013

5.8

2018

6.9

1971

7.0

1998

6.1

2006

5.6

2002

6.1

1989

6.3

1999

6.5

2005

4.8

1996

0.0

1976

6.6

2023

0.0

2007

5.6

2007

7.4

2003

5.9

1981

7.0

2016

7.1

2004

4.9

2014

5.0