2013 Budget – Sources: This is a pie chart showing the sources of revenues for the 2013 budget year, in millions. Customer revenues are $2,110.4 or 74% of the total budget. NYISO Market Revenues are $643.1 or 22% of the total budget. Investment Income is $27.7 or 1% of the total budget. Other Income is $76.6 or 3% of the total budget.