1993

5.6

2003

5.6

2006

4.9

2004

3.7

2004

4.0

2001

3.5

1999

3.0

1970

3.8

1989

3.7

1996

3.7

2002

3.7

2021

2.0

2012

6.2

2012

4.7

2005

5.2

1975

0.0

2023

7.0

1983

4.4

1979

6.0

2000

4.2