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Number and proportion of countries distributed by number of KPsa with HIV prevalence SNUb data (2001-2017; N=123).
| Status of HIV prevalence SNU data | Number of countries, n (%) |
| No data | 10 (8.1) |
| 1 population | 17 (13.8) |
| 2 populations | 33 (26.8) |
| 3 populations | 45 (36.6) |
| 4 populations | 18 (14.6) |
aKP: key population.
bSNU: subnational unit.
