2005

6.6

2004

6.4

2005

7.0

1998

6.9

1996

6.6

1972

7.1

2002

7.1

2001

6.2

2003

7.8

1962

8.0

1987

5.3

2003

5.9

1992

5.8

1994

4.5

1992

6.7

2001

0.0

2017

5.2

2019

7.3

2013

5.6

2014

3.5