The number of personnel joining the Royal Naval Service since 2005 can be found in Table 3 of Tri-Service Publication (TSP) 1 - Strength, Intake and Outflow of UK Regular Forces. The number of personnel leaving the Royal Naval Service since 2005 can be found in Table 4 of the same publication. TSP 1 is published monthly. The most recent publication shows figures for data from 1 April 2003 to 1 March 2008 and can be found at
http://www.dasa.mod.uk/natstats/tsp1/intake.html
for Table 3 and for Table 4
http://www.dasa.mod.uk/natstats/tspl/outflow.html
Copies of TSP 1 are available in the Library of the House and also at
www.dasa.mod.uk