patrick.net

https://taxfoundation.org/summary-latest-federal-income-tax-data-2016-update/

For 2014:

Top 1% ($465k+) took 20% of the AGI, paid 40% ($540B) of the taxes, 27% tax rate.
Top 5% ($188K+) took 36% of the AGI, paid 60% ($824B) of the taxes, 23.6% tax rate.
Upper middle quartile ($38K ~ $77K) took 20% of the AGI, paid 10% ($140B) of the taxes, 7% tax rate.
Bottom 50% (under $38K) took 11% of the AGI, paid 3% ($37B) of the taxes, 3.5% tax rate.

For 2013, top 5% collected 34% of the AGI

https://taxfoundation.org/summary-latest-federal-income-tax-data-2015-update/

2012: top 5% collected 37% of the AGI

https://taxfoundation.org/summary-latest-federal-income-tax-data-0/

2011:

https://taxfoundation.org/summary-latest-federal-income-tax-data/