Estimated population viral suppression rate for all people living with HIV in the Western Cape
| Year | End of year population* | Total HIV prevalence (%) † | HIV-infected population | Individuals with VL <1000 copies/mL | Proportion virally suppressed (%)‡ |
| 2008 | 5 308 512 | 4.9 | 261 332 | 32 035 | 12.3 |
| 2009 | 5 288 519 | 5.2 | 275 266 | 49 452 | 18.0 |
| 2010 | 5 254 963 | 5.5 | 287 057 | 58 610 | 20.4 |
| 2011 | 5 455 552 | 5.7 | 310 433 | 80 899 | 26.1 |
| 2012 | 5 819 473 | 5.9 | 342 790 | 104 166 | 30.4 |
| 2013 | 6 063 550 | 6.1 | 368 182 | 126 828 | 34.4 |
| 2014 | 6 157 898 | 6.2 | 383 989 | 140 208 | 36.5 |
| 2015 | 6 222 410 | 6.4 | 397 189 | 169 869 | 42.8 |
| 2016 | 6 396 236 | 6.5 | 416 515 | 198 339 | 47.6 |
| 2017 | 6 564 961 | 6.6 | 434 634 | 221 534 | 51.0 |
| 2018§ | 6 655 523 | 6.7 | 446 303 | 194 494 | 43.6 |
*Interpolated from SA midyear population estimates.
†Obtained from the Thembisa model.
‡Assumes those not in care have VL >1000 cps/mL.
§Estimates for the end of September 2018.
VL, viral load.