1989

5.3

2013

8.5

2011

9.5

1989

5.7

2001

6.2

1976

4.5

1985

5.8

1973

9.2

2010

5.9

1987

6.8

1994

5.5

2012

9.4

2003

5.4

2012

9.7

2015

5.0

2012

6.5

2001

4.9

2024

8.2

2012

6.2

2000

5.8