Excel Viewer | Adobe® Reader Statistics of Income (SOI) Bulletin - Fall 2017 PDF (entire publication in PDF) Featured articles Sole Proprietorship Returns, Tax Year 2015 PDF By Adrian Dungan For Tax Year 2015, taxpayers reported nonfarm sole proprietorship activity on approximately 25.2 million individual income tax returns, a 2.4-percent increase from 2014. Profits rose to $331.8 billion in 2015, a 4.7-percent increase from the previous year. In constant dollars, total nonfarm sole proprietorship profits increased 3.5 percent in 2015. Total profits as a percentage of business receipts were 23.0 percent for 2015, the second highest level in this data series which begins in 1988. The largest percentage increase in profits was reported by the real estate sector which increased 15.1 percent or $3.7 billion. Excel Tables: 1 XLS, 2 XLS Related Link: Nonfarm Sole Proprietorship Statistics Departments SOI Sampling Methodology and Data Limitations Upcoming SOI Data Releases Historical Tables and Appendix