At a time of the year when the ratings arrow is pointing down for most shows, A&E’s ground-breaking documentary series “60 Days In” continues to grow — last week rising for a fifth straight week and becoming the network’s top-rated program among young adults.

The program, which A&E renewed for a second season even before the first premiered, has averaged 2.4 million total viewers in Nielsen’s “live plus-3” estimates since its March 10 premiere, including 1.4 million adults 18-49. In adults 25-54, “60 Days In” now stands as the calendar year’s No. 1 new reality series on cable with 1.5 million viewers.

Among same-day viewing, “60 Days In” has moved up to become the No. 1 series on A&E among adults 18-49. Since its opening hour on March 10 averaged a 0.39 rating in the demo, it has grown with each episode; last week’s 0.85 rating represented a 9% jump week to week (from 0.78) and a huge 118% surge from the premiere. It finished neck and neck Thursday at 10 p.m. with CBS drama “Rush Hour” in 18-49 while leading all of television at 10 p.m. among adults 18-34 (0.73 rating).

The original docu-series follows innocent participants who enter the dangerous world of incarceration at the Clark County Jail in Jeffersonville, Indiana, in an effort to expose internal issues and what really happens behind bars. As a result of the facility’s recent corrupt history, Sheriff Jamey Noel has devised a program where seven participants live among the facility’s general population for 60 days without officers, fellow inmates or staff knowing their secret.

“60 Days In” is produced by Lucky 8 TV. Executive producers for Lucky 8 are Gregory Henry, Kimberly Woodard and Jeff Grogan. Executive producers for A&E Networks are Elaine Frontain Bryant, Shelly Tatro, Drew Tappon and Brad Holcman.

Season two is set to air this summer.

In other L+3 ratings news for cable reality shows, Bravo’s sixth-season finale of “Real Housewives of Beverly Hills” on April 12 hit a season high in total viewers (3.1 million) while also rising in adults 18-49 (1.6 million, up 6%) and adults 25-54 (1.9 million, up 8%). For the season, it averaged 2.8 million total viewers, including 1.6 million adults 18-49 and 1.8 million adults 25-54.

And the network’s fifth-season premiere of “Shahs of Sunset” shot up by 15% vs. last year in adults 18-49 (to 1.1 million) and by 20% in total viewers (to 2 million) vs. its season four opener.