1968

7.6

1975

5.5

1995

4.1

1969

3.8

2009

7.5

1969

0.0

2003

7.8

1972

5.6

2007

5.8

1977

5.5

2009

6.5

1999

5.5

2005

6.3

2002

5.0

1997

1.8

1965

3.2

2015

3.7

2021

0.0

2014

6.0

1969

3.8