Price per kg of SBB (US $)

2012

2013

Mean

SD

Min

Max

Mean

SD

Min

Max

Private

21

3.1

0.6

1.8

4.4

3.3

0.6

2.2

4.4

Social

21

2.8

0.5

1.7

4.1

3.0

0.5

2.0

4.0