Region
|
year
|
Collected without treatment
|
Primary
|
Secondary
|
Tertiary
|
Northern
|
1995
|
4.3
|
3.6
|
3.1
|
74.6
|
Northern
|
2000
|
2.3
|
5.8
|
2.6
|
72.4
|
Northern
|
2005
|
1.7
|
5.8
|
2.7
|
73.9
|
Northern
|
2010
|
1.4
|
6.4
|
2.3
|
75.0
|
Northern
|
2015
|
1.0
|
5.6
|
2.3
|
77.0
|
|
|
|
|
|
|
Central
|
1995
|
8.0
|
4.8
|
33.0
|
47.1
|
Central
|
2000
|
3.7
|
0.5
|
26.3
|
61.5
|
Central
|
2005
|
2.1
|
0.0
|
20.2
|
74.8
|
Central
|
2010
|
0.6
|
0.1
|
18.9
|
76.9
|
Central
|
2015
|
0.5
|
0.0
|
16.5
|
80.1
|
|
|
|
|
|
|
Southern
|
1995
|
6.3
|
8.7
|
33.3
|
14.6
|
Southern
|
2000
|
5.9
|
5.1
|
44.7
|
19.2
|
Southern
|
2005
|
5.5
|
5.1
|
34.5
|
30.7
|
Southern
|
2010
|
1.1
|
3.8
|
31.1
|
56
|
Southern
|
2015
|
0.1
|
2.2
|
21.3
|
53.4
|
|
|
|
|
|
|
Eastern
|
1995
|
|
|
|
|
Eastern
|
2000
|
|
|
|
|
Eastern
|
2005
|
2.1
|
5.9
|
19.7
|
36.4
|
Eastern
|
2010
|
1.8
|
2.2
|
18.1
|
46.8
|
Eastern
|
2015
|
1.1
|
0.2
|
13.6
|
60.6
|
|
|
|
|
|
|
South Eastern
|
1995
|
|
|
|
|
South Eastern
|
2000
|
|
|
|
|
South Eastern
|
2005
|
22.7
|
11.6
|
19.2
|
6.7
|
South Eastern
|
2010
|
22.6
|
11.9
|
19.2
|
14.4
|
South Eastern
|
2015
|
17.6
|
16.7
|
22.8
|
20.6
|