WSP

January 2013 (x)

Before 2004 (y)

Difference (x − y)

CHEMOSIT

7.6

7.2

0.4

KIWASCO

6.3

5.5

0.8

MIKUTRA

5.3

5.6

−0.3

SNWSCO

5.7

6.7

−1

MOGOMBET

5.1

5.3

−0.2

BOYA

3.6

3.65

−0.05

NYASARE

5.2

6.6

−1.4

OVERALL MEAN

5.9

6.1

−0.2