| Year | Value (Population) |
|---|---|
|
2022 |
18358234 |
|
2021 |
18143458 |
|
2020 |
17354831 |
|
2019 |
16581915 |
|
2018 |
15829023 |
|
2017 |
15091777 |
|
2016 |
14365903 |
|
2015 |
13652870 |
|
2014 |
12954970 |
|
2013 |
12269329 |
| Proportion of population served with at least basic water | 13538293 | Population (2022) |
| Proportion of population with unimproved water | 3127990 | Population (2022) |
| Proportion of population with surface water | 6038302 | Population (2022) |