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.
Federal Income Taxes U.S. federal income tax brackets range from 10% to 35% for individuals. On the Canadian side, the range is 15% to 29%. In the U.S., the lowest tax bracket bumps to 15% at $8,500 and to 25% at $34,501. The bottom Canadian bracket stays at 15% until $41,544.