1993

6.9

2011

5.5

1975

7.2

2009

5.1

1988

5.3

2007

4.9

1992

6.2

2012

6.3

1977

5.9

2024

7.9

2004

7.1

2014

6.3

2001

6.1

2010

6.5

2010

7.1

2016

4.9

1972

6.6

2001

5.4

2012

6.9

2016

4.2