2021

6.3

2005

5.8

2008

6.2

2002

6.8

1999

5.5

2000

7.1

1971

6.2

2008

6.4

2007

7.6

2004

6.9

2005

6.2

2001

7.4

1994

8.0

1978

7.5

2016

0.0

2005

5.1

2006

4.6

1972

5.0

2004

6.1

1990

5.8