After two months of record lows, veteran unemployment ticked upward last month, according to the latest U.S. labor statistics released Friday.

Four percent of veterans were unemployed in November, marking the second highest unemployment rate of 2017 since January’s 4.5 percent. Bureau of Labor Statistics data also show unemployment among post-9/11 veterans rose by 1 percentage point to 4.6 percent, and the rate for veterans of the Gulf War era grew to 3 percent from 1.9 percent.

The rise in unemployment comes after a record-setting October, when veteran unemployment dropped to 2.7 percent — the lowest since 2006, the earliest year for which data is publicly available. This broke September’s previous all-time low of 3 percent.

But the monthly employment figures can be volatile, say experts, who warn against putting too much stock in the figures because veteran unemployment data is drawn from a much smaller sample size than the overall population.

The national unemployment rate remained unchanged in November at 4.1 percent, while non-veteran unemployment decreased slightly to 3.7 percent. The U.S. gained 228,000 jobs, with the largest growth coming from the professional and business services, manufacturing and health care professions.