This page has an excellent overview of the effectiveness and cost effectiveness of chiropractic care for low back pain over a 20 year timespan.

Here are some highlights, see the original post for citations:
1993: ”there would be highly significant cost savings if more management of LBP was transferred from medical physicians to chiropractors.”
1994: ”only chiropractic care could both reduce pain AND improve function.”
1995: “those treated by chiropractic derive more benefit and long term satisfaction than those treated by hospitals.”
2004: 90 billion dollars is spent for the care for back pain every year, and 15% of that was for pain medications. Hint: it’s probably more than $90B per year now…
2005: “chiropractic scored the highest pain relief rating”
2008: “offering chiropractic services within a managed-care environment could save insurers 27% in back pain episode-related costs!”

Another great study showing effectiveness and cost savings provided by chiropractic care.
It is very costly to manage neuromusculoskeletal disorders using traditional medicine. When individuals visit chiropractors, a great deal of money is saved.