The register-based labour market statistics (RAMS) produced annually by Statistics Sweden are comprehensive statistics based on, among other things, employers’ wage statements and self-employed persons' tax returns. The total population for RAMS includes all persons registered in Sweden at year-end. The statistics present the number of employees and earning intensity of different groups of the population using the month of November as the reference period. Gainfully employed. All persons deemed to have carried out an average of one hour's work per week during November are registered as gainfully employed. Those who were temporarily absent during the assessment period, for instance due to illness, are also included in the survey. When it cannot be ascertained from a wage statement whether an individual was employed during November, the size of the annual salary is used as a criterion. If the annual salary is greater than the indexed base amount then the person is deemed gainfully employed. Certain benefits, such as sickness benefit and parents’ allowance, are in this regard included as salary. Self-employed business owners. Only persons declaring income from active business operations are registered as gainfully employed in the Register-based labour market statistics (RAMS). In order to be viewed as active, the individual subject to taxation must have engaged in business activities to an extent corresponding to at least one third (500 hours) of full-time employment.