2018

10.0

2019

7.0

2000

6.3

1997

6.0

2008

4.9

2007

8.6

2017

8.2

1998

5.4

1999

5.9

2013

6.7

1966

6.7

1978

6.8

1966

6.4

2009

5.7

1997

4.5

2007

6.2

1985

6.5

1973

7.5

1984

7.6

2010

6.9