1981

7.5

2011

0.0

2016

0.0

2022

6.6

1981

6.2

2004

6.8

2019

6.0

2013

0.0

2005

7.7

2019

6.4

2012

7.9

2001

5.0

2008

7.8

1997

7.4

1993

6.5

1999

6.8

1977

7.2

2002

7.9

1987

8.4

1986

7.7