History of income tax rates

See if you notice any trends. If so, please comment what you see.

History of income tax rates adjusted for inflation (1913–2010)^[70]^[71]
	Number of	First Bracket	Top Bracket
Year	Brackets	Rate	Rate	Income	Adj. 2016	Comment
1913	7	1%	7%	$500,000	$12 million	First permanent income tax
1917	21	2%	67%	$2,000,000	$36.9 million	World War I financing
1925	23	1.5%	25%	$100,000	$1.35 million	Post war reductions
1932	55	4%	63%	$1,000,000	$17.3 million	Depression era
1936	31	4%	79%	$5,000,000	$85.3 million	–
1941	32	10%	81%	$5,000,000	$80.4 million	World War II
1942	24	19%	88%	$200,000	$2.9 million	Revenue Act of 1942
1944	24	23%	94%	$200,000	$2.69 million	Individual Income Tax Act of 1944
1946	24	20%	91%	$200,000	$2.43 million	–
1964	26	16%	77%	$400,000	$3.05 million	Tax reduction during Vietnam war
1965	25	14%	70%	$200,000	$1.5 million	–
1981	16	14%	70%	$215,400	$561 thousand	Reagan era tax cuts
1982	14	12%	50%	$85,600	$210 thousand	Reagan era tax cuts
1987	5	11%	38.5%	$90,000	$187 thousand	Reagan era tax cuts
1988	2	15%	28%	$29,750	$59.5 thousand	Reagan era tax cuts
1991	3	15%	31%	$82,150	$143 thousand	Omnibus Budget Reconciliation Act of 1990
1993	5	15%	39.6%	$250,000	$410 thousand	Omnibus Budget Reconciliation Act of 1993
2003	6	10%	35%	$311,950	$401 thousand	Bush tax cuts
2011	6	10%	35%	$379,150	$399 thousand	–
2013	7	10%	39.6%	$400,000	$406 thousand	American Taxpayer Relief Act of 2012