The Foundation Center provides this free database where you can find data on grants given per year, including dollar value of those grants, by subject areas. This database also allows you to view data by population groups and recipient location. Additional statistics include aggregate grant fiscal data and top grant givers.
Statista offers over 1 million statistics ranging across a myriad of social, economic, and market-related topics. Data may be exported in PPT, XLS, PDF, and PNG formats.
Beginning with 2013, ProQuest has published this annual compilation of statistics compiled by both government and private sources. Tables may be downloaded in both PDF and Excel formats.