There have been big changes in the landscape for funding the AIDS response since 2010. In constant 2016 United States dollars, overall funding in low- and middle-income countries increased from US$ 15 billion in 2010 to US$ 19 billion in 2018.
Within that increase in funding, there have been big changes in the sources of the funding. The amount of money that countries have invested in their own response to HIV has increased hugely, from US$ 7.1 billion to US$ 10.7 billion, equivalent to 56% of all funding. Bilateral aid from the United States of America increased from US$ 3.5 billion in 2010 to US$ 5.1 billion in 2018.
Other sources of funding have either stayed still or decreased, for example all bilateral funding other than that from the United States and all multilateral funding other than from the Global Fund---a worrying trend.
Even more worrying, however, is that UNAIDS estimates that US$ 26.2 billion will be required annually for the AIDS response in 2020---US$ 7 billion more than that available in 2018.
More information can be found on the UNAIDS HIV financial dashboard.