The category receiving the lowest monthly income is domestic service workers —95% of whom are women (ECLAC, 2013b)— whose income is slightly lower than that of unskilled self-employed workers. The monthly income of own-account workers is relatively similar to that of public sector workers. Although it is not possible to monitor the working life and the trend in labour income of each member of the active labour force on the basis of household surveys, an analysis of labour income levels in different age cohorts gives a good indication. As shown in figure I.8.B, and as may be expected, labour income (wages, income from independent work or employers' earnings) increases as workers gain more experience. Nonetheless, labour income levels are clearly the highest among workers aged 50-54 years, and then decline gradually, by 4.7% on average for those aged 55-59 years and by 13.7% among workers aged 60-64 years.