Panel	Sample Size	Weighted
Panel 12 (2007/2008)	12,440	307,604,278
Panel 13 (2008/2009)	18,287	310,792,518
Panel 14 (2009/2010)	16,221	312,141,711
Panel 15 (2010/2011)	14,541	314,909,377
Panel 16 (2011/2012)	18,512	316,781,778
Panel 17 (2012/2013)	17,923	318,971,967
Panel 18 (2013/2014)	16,714	321,609,625
Total number of respondents	114,638
We dropped respondents who were
Less than 16 years of age	31,204
Not employed in the first or second year of each of the survey panels	26,980
In the military	231
Public sector employees	2,322
Self-employed	7,176
Not interviewed in all the 5 rounds in each panel	1,383
Missing values for the variables used in the analyses	6,418
Respondents used in the analyses	38,924
Total number of observations	71,244