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.
Average tax rates measure tax burden, while marginal tax rates measure the impact of taxes on incentives to earn, save, invest, or spend. The average tax rate is the total amount of tax divided by total income. For example, if a household has a total income of $100,000 and pays taxes of $15,000, the householdâs average tax rate is 15 percent. The marginal tax rate is the incremental tax paid on incremental income.