The headlines seem almost too good to be true. As of April, the United States' unemployment rate reached a multi-year low of 3.9%. There's got to be a catch or an anomaly, right?

Nope. As crazy as the number sounds, it's legit. That's not to say there aren't some curiosities worth noting and watching going forward though. But, in step with falling unemployment, wages are rising, fewer people are reporting they're searching for a job, and more people are reportedly working a job. The biggie of those three is wage growth, which surged last month, indicating employers are now getting much more serious about getting workers, competing with other employers.

First things first – the unemployment rate and job growth. Unemployment fell to 3.9% of the workforce, as the economy created 164,000 new jobs. That's actually less than the 193,000 economists had predicted, but those guesses mean little at this time. It's not so much a lack of jobs holding the job-growth figure back. It's the lack of available workers.

Nowhere is this more apparent than in wage growth.

Unfortunately, the image below doesn't show hourly wages through April. The plots only go through March. We do have the figures though. Hourly wages were up 2.6% year-over-year, following through on March's nicely pronounced improvement… when the fight for employees went into high gear.

And for the record, workers didn't lose hours worked to fund higher hourly earnings. The average workweek has held steady at 34.5 hours for the past few months.

As was also noted, the big improvement in April's unemployment rate wasn't just some lucky math. The number of people with jobs edged higher, from 155,178,000 to 155,181,000. The number of people without jobs but want one fell from 6,585,000 to 6,346,000… another multi-year low. The number of people without jobs but want one – and aren't being counted as ‘unemployed' actually moved a little higher, from 5,096,000 to 5,115,000, but that's still very near multi-year lows.