Some Stats from 2015 :-

Median Age / Profession

42.1 Computer systems analysts

44.7 Information security analysts

43.1 Computer programmers

39.7 Software developers, applications and systems software

35.9 Web developers

40.5 Computer support specialists

47.0 Database administrators

41.2 Network and computer systems administrators

41.6 Computer network architects

41.2 Computer occupations, all other

Source : http://www.bls.gov/cps/demographics.htm