2002

3.8

2001

5.1

1968

2.7

1993

7.8

2002

5.6

1975

5.5

1969

3.8

2009

7.5

1995

4.6

1999

5.4

1988

3.6

2004

5.5

2018

4.4

1972

5.2

2014

5.2

1999

4.6

1964

3.9

2000

3.7

1966

5.9

2005

6.4