The annual estimates reflect amounts that change as a result of science, actual research projects funded, and the NIH budget. The research categories are not mutually exclusive. Individual research projects can be included in multiple categories so amounts depicted within each column of this table do not add up to 100 percent of NIH-funded research. The table shows historical data for FY 2010 through FY 2013. The FY 2014-2015 estimates are based on RCDC actual data.