UK private sector occupational pension schemes: active members 1991-2013, by rate

Data does not include schemes with fewer than 12 members and non-respondents.
The source adds the following information: "Changes to methodology for 2006 onwards mean that comparisons with 2005 and earlier should be treated with caution.
"In 2010, the OPSS questionnaire was redeveloped to ensure that if there were different contribution rates for different groups of members, then these were recorded. The scheme was asked to give the different rates and the corresponding proportion of active members to whom that rate applied. Prior to 2010, only the contribution rate that applied to the majority of members was recorded. This means that caution should be exercised when comparing the figures for 2010 and onwards with earlier estimates."