/Y Y/Y Growth -~- 11% 15% 3% over past 15 years Individual Income Taxes* $590 $1,005 $927 $899 Largest driver of revenue % of Revenue 44% 50% 43% 42% Social Insurance Taxes $484 $653 $794 $865 Payroll tax on Social Security + % of Revenue 36% 32% 37% 40% Medicare Corporate Income Taxes* $157 $207 $278 $191 Fluctuates sig