2014

5.3

2010

7.2

2012

7.3

6.0

1993

5.8

2020

7.3

2000

5.1

1985

6.5

1975

4.5

2004

4.7

1988

6.1

2003

5.1

2020

5.5

2021

7.8

2009

4.8

1998

5.3

2011

7.2

1999

5.1

1967

6.2

2010

7.0