Cause. Hives can also be classified by the purported causative agent. Many different substances in the environment may cause hives, including medications, food and physical agents. In perhaps more than 50% of people with chronic hives of unknown cause, it is due to an autoimmune reaction. Medications
The average American pays almost 30% of their income to taxes. Here's the breakdown. According to the IRS's preliminary data from the 2015 tax year (the returns you filed during 2016), there was a total of $1.454 trillion in income tax owed, which translates to an average effective federal income tax rate of about 13.5% per return.
Corporations are subject to federal graduated rates of tax from 15% to 35%; a rate of 34% applies to income from $335,000 to $15,000,000. State income tax rates vary from 1% to 16%, including local income tax where applicable. State and local taxes are generally deductible in computing federal taxable income.