2004

5.6

1987

7.3

1999

7.4

2003

5.8

1997

6.1

1997

4.7

2015

5.4

2003

6.0

2005

4.8

2004

6.5

1997

7.6

1993

7.0

1990

3.5

2007

6.6

2006

5.8

1953

4.2

2004

3.6

1992

5.7

1967

6.9

1974

5.9