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.
For those who make between $10,000 and $20,000 the average total tax rate is 0.4 percent. (The average tax rate for those in the lowest income tax bracket is 10.6 percent, higher than each group between $10,000 and $40,000.This is likely because the amount of refundable tax credits is much smaller for the income group that makes under $10,000.).The average tax rate for those in the lowest income tax bracket is 10.6 percent, higher than each group between $10,000 and $40,000. This is likely because the amount of refundable tax credits is much smaller for the income group that makes under $10,000.).