intriguing... I'm American and I remember those days, nothing comes to mind. "Every two weeks" sounds likely paycheck related though, but for instance those don't sound like hours worked or anything like that.
the other comment about flextime, maybe, could be "hours of holiday time accrued" and it goes up and down because he spends it? Maybe a military person would know better, maybe in some subreddit.
242/119, 246/85, 183/78, 187/84, 207/76, 115/197, 121/201, ...
Maybe it's obvious to Americans? Is it related to sports? I sure hope it's not their blood pressure!