1991

4.0

2017

5.9

1970

3.8

2003

6.6

1996

7.0

2001

7.4

1991

5.7

2007

6.2

2006

6.2

1973

3.4

2025

8.0

2004

5.3

1975

7.4

2010

5.1

1977

4.6

2000

4.4

2011

6.6

1970

5.2

1978

5.9

1969

3.1