Guttmacher Institute has compiled facts and figures for all 50 states regarding the incidences of and costs of unintended pregnancies. This is a detailed state by state analysis, including statistics on abortion. I live in Missouri, where these statistics apply (follow the link to Guttmacher for the stats on your state):

• In 2006, 53% of all pregnancies (61,000) in Missouri were unintended, compared with 49% nationally. • Missouri’s unintended pregnancy rate in 2006 was 51 per 1,000 women aged 15-44. Nationally, the rate was 52 per 1,000, ranging from a low of 36 per 1,000 in New Hampshire to a high of 69 per 1,000 in Mississippi. • The teen pregnancy rate in Missouri was 63 per 1,000 women aged 15-19 in 2005. The national teen pregnancy rate was 70 per 1,000, ranging from 33 per 1,000 in New Hampshire to 93 per 1,000 in New Mexico. • In 2006, 61% of unintended pregnancies in Missouri resulted in births and 25% in abortions; the remainder resulted in miscarriages. • In Missouri in 2006, 46% of all births (37,700) resulted from unintended pregnancies, compared with 38% nationally. • The services provided by family planning centers in Missouri helped avert 20,800 unintended pregnancies in 2008, which would likely have resulted in 9,200 births and 8,700 abortions.