2013

5.6

2001

5.9

2003

5.7

1988

7.3

2006

6.5

1976

4.0

1977

4.0

1991

6.7

1972

6.7

2002

6.1

1975

6.7

2005

5.0

2006

5.2

2017

6.3

2005

6.2

1994

7.4

2000

4.8

1984

6.0

1980

1.0

2021

5.0