Go to that link you provided and look at the link there that says Tax Rate Schedules. They provide what you want. They'll be a few bucks off for those with taxable income of $100,000 or less, but you don't care.

There are three things to remember:
1) These are taxes on your taxable income, which is net of your personal exemptions and deductions. For a single filer in 1998, who took the standard deduction, that was $6950.
2) They omit Social Security and Medicare taxes, which are going to be 7.65% straight off the top of the first $76,200[*] of your income earned from wages, and 1.45% of all the rest of your income earned from wages.
3) State taxes vary all over the place but are roughly 5% of your income in California, New York, and Massachusetts.

[*]Could be wrong -- it was $72,600 in 1998.