41. US FINANCIAL OBLIGATIONS (IN TRILLIONS) 2000 2006 Increase Debt $6.9 $10.4 52% Contingencies $0.5 $1.3 140% Future Obligations $13.0 $38.8 197% Social Security benefits $3.8 $6.4 Medicare Part A $2.7 $11.3 Medicare Part B $6.5 $13.1 Medicare Part D ⊠$7.9 TOTAL $20.4 $50.5 147%