What are the long-term trends for multiple jobholders in the US? The Bureau of Labor Statistics has two decades of historical data to enlighten us on that topic, courtesy of Table A-16 in the monthly Current Population Survey of households.

At present, multiple jobholders account for just 4.6 percent of civilian employment. The survey captures data for four subcategories (in pie chart at right) of the multi-job workforce, the current relative sizes of which are illustrated in a pie chart. The distinction between "primary" and "secondary" jobs is a subjective one determined by the survey participants.

Note: Not included in the statistics are the approximately 0.26% of the employed who work part-time on what they consider their primary job and full time on their secondary job(s).

Let's review the complete series to help us get a sense of the long-term trends. Here is a look at all the multiple jobholders as a percent of the civilian employed. The dots are the non-seasonally adjusted monthly data points, which are quite volatile, and a 12-month moving average to highlight the trend. The moving average peaked in the summer of 1997 and then began trending downward. It is now at 4.4%, and the latest monthly data point is 4.6%.