Summary

DescriptionUS abortion by gestational age 2004 histogram.svg	English: Histogram of abortions by gestational age for the United States in 2004. Horizontal axis is weeks and vertical axis is thousands of abortions. Data is taken from the Centers for Disease Control and Prevention. Updated version of Image:US abortion by gestational age 2002 histogram.svg, but data is almost identical.
Date	1 June 2009
Source	Own work  W3C-validity not checked. Category:Unchecked SVG validity Plotted by hand because it would have taken just as long to learn a new plotting program.
Author	Omegatron
Other versions	US 2004 US 2002 UK 2004 US 2016

Data

Gest. week Abortions   weeks/bin   Abortions/week  /1000   Percent
<9 weeks   400197      8           50024.63        50.02   60.6%
9-10       112936      2           56468           56.47   17.1%
11-12      60323       2           30161.5         30.16   9.1% 
13-15      41517       3           13839           13.84   6.3%
16-20      24837       5           4967.4          4.97    3.8%
> 21       8365        19          440.26          0.44    1.3%

Guttmacher data is similar, not sure if it's from the same source: archive copy at the Wayback Machine

<9 weeks 61.3%
9-10     17.8%
11-12    9.6%
13-15    6.7%
16-20    3.5%
>21      1.1%

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