8 year old data now but i did the same as a poll in 2013 - see here
with the following summary
70% of respondents wear a uniform (VRT/SNCOs)
49% of respondents are VRTs
21% are SNCOs
19% are CIs57% of respondents are in the 20 - <35 age bracket
21% are 35 - <50
and only 11% are 50+