“As Americans finish yet another tax filing season, let’s take a look at the 104-year history of the income tax: In 1913 the top marginal income tax bracket was 7% — today it is 39.6%. In 1913 the marginal income tax bracket range was 1% – 7%. Today the range is 10% – 39.6%. In 1913 there were 400 pages in the tax code. Today there are 74,608 pages in the code. In 1913 the family standard deduction was $98,425.45 in today’s dollars.”
Source: 104 Years of the Income Tax: Then and Now