2024 19 USC 2391 – GAO study and report

2023 19 USC 2391 – GAO study and report

2022 19 USC 2391 – GAO study and report

2021 19 USC 2391 – GAO study and report

2020 19 USC 2391 – GAO study and report

2018 19 USC 2391 – GAO study and report

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2015 19 USC 2391 – GAO study and report

2014 19 USC 2391 – GAO study and report

2013 19 USC 2391 – GAO study and report

2012 19 USC 2391 – GAO study and report

2010 19 USC 2391 – GAO study and report