2001

5.4

2008

2.7

1999

5.1

1977

3.9

1969

5.5

2015

4.9

2014

7.8

2019

4.8

1977

5.7

1999

5.2

2011

3.6

2018

7.4

2003

5.0

2013

4.4

1985

3.9

1978

4.7

2000

2.7

2015

4.6

2004

3.0

2013

1.5