The information requested falls within the responsibility of the UK Statistics Authority. I have asked the authority to reply.
Letter from Dennis Roberts, dated February 2010:
The Director General for the Office for National Statistics has been asked to reply to your recent Parliamentary Question asking what the (a) mean, (b) median, (c) 10th percentile and (d) 90th percentile levels of (i) private and (ii) public sector salaries were in each of the years since 1997, broken down by (A) region and (B) industrial category. I am replying in his absence. (318688)
Annual levels of earnings are estimated from the Annual Survey of Hours and Earnings (ASHE), and are provided for full-time employees on adult rates of pay, who have been in the same job for more than a year. The ASHE, carried out in April each year, is the most comprehensive source of earnings information in the United Kingdom.
Tables showing annual salary estimates for full-time employees according to the breakdowns you requested will be placed in the Libraries of the House. The figures are provided for each year from 1999, the earliest period for which annual earnings estimates are available.