; or (ii) for a conviction of a new felony offense. (B) The term baseline period means the period beginning January 1, 2012, and ending December 31, 2014. (b) Annual revocation calculations At the conclusion of the calendar year following the implementation of subsection (a), and every calendar year thereafter, the Director of the Administrative Office of the United States Courts, in consultation with the Director of the Bureau of Prisons and the United States Sentencing Commission shall calculate the following measures: (1) Average revocation cost The average revocation cost, which is the average cost to incarcerate a supervisee revoked to prison in the previous year, including average length of stay times average marginal cost per day. (2) Nationwide revocation rate The nationwide revocation rate, which is calculated as the number of supervisees nationwide sent to prison in the previous year as a percentage of the nationwide supervision population as of June 30th of that year. (3) District revocation rates For each judicial district, the district’s revocation rate, which is calculated as the number of supervisees from that district sent to prison in the previous year as a percentage of the district’s supervision population as of June 30th of that year. (4) Reduction in revocation rate For each judicial district, the reduction in revocation rate is the number of adult supervisees from each district not revoked to prison, which is calculated based on the reduction in the district’s revocation rate as calculated under paragraph (3) from the district’s baseline revocation rate as calculated under subsection (a). In making this estimate, the Director of the Administrative Office of the United States Courts, in consultation with the Director of the Bureau of Prisons and the Judicial Conference of the United States, may adjust the calculation to account for changes in each district’s caseload in the most recent completed year as compared to the district’s adult supervision population during the years 2012 through