If your clients are 65 or older and plan on retiring, congratulations! Now they can start looking for a part-time job.

Over half of seniors surveyed by the Employee Benefit Research Institute said they continue to work past 65 because they want to stay active and involved.

People over 65 are continuing to work past retirement and the number of participants has nearly doubled in the past two decades, according to the Bureau of Labor Statistics.

Smartasset conducted a study and found that the average participation rate for seniors still working in the 100 cities analyzed was 17.7 percent. Of the 100 cities in the study, 84 cities saw a growing number of seniors working.

The study concentrated on 100 cities with the largest senior population, and ranked them by how much their senior citizen workforce participation rate increased from 2012 to 2016.

These are the cities, in ascending order, where the highest percentage of seniors are still working:

10. San Diego (tie)

Coastal life and sunny weather doesn’t come cheap in the southern California city, so seniors may need to continue working just to afford the lifestyle. In 2012, 15.9 percent of seniors were working, compared with 18.4 percent in 2016.