>Social Security's total income is projected to exceed its total cost through 2019, as it has since 1982. The 2015 surplus of total income relative to cost was $23 billion. However, when interest income is excluded, Social Security's cost is projected to exceed its non-interest income throughout the projection period, as it has since 2010. The Trustees project that this annual non-interest deficit will average about $69 billion between 2016 and 2019. It will then rise steeply as income growth slows to its sustainable trend rate as the economic recovery is complete while the number of beneficiaries continues to grow at a substantially faster rate than the number of covered workers.