4.5

1988

0.0

2006

2.0

2015

4.9

2025

8.0

1988

8.3

1999

2.0

2009

0.0

1990

7.1

1970

6.2

1992

8.0

1980

6.0

8.0

1952

6.8

1999

5.0

2012

0.0

1989

5.7

1975

4.6

2003

6.3

1961

4.9