I am currently working on a project related to retention of bedside nurses. I would like to know if anyone has statistical data that explains the experience level of icu nurses in the US.
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Article Understanding current intensive care unit nursing handover practices
Mullen-Fortino, M., DiMartino, J., Entrikin, L., Mulliner, S., Hanson, C. W., & Kahn, J. M. (2012). Bedside nurses’ perceptions of intensive care unit telemedicine. American Journal of Critical Care, 21(1), 24-32.
http://ajcc.aacnjournals.org/content/21/1/24.full
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Given your paramaters of within-US, I believe with a bit of digging you can come up with the descriptive data you're seeking by searching the US Bureau of Labor Stats (BLS), URL --> https://www.bls.gov/opub/ted/employment.htm?view_full
I can suggest to keyword search (variable name scope) 'work experience' OR 'TENURE'.
Hope this may of some useful help to you, and best of luck on your study!