Without the total number of attempts, number of failures and ideally how those failures are distributed, it tells us almost nothing

There simply cannot have been that many border crossings that failed this way — the eVisa system has only been in force without any fallback alternatives for a few months and only four million people hold them anyway.

Proportionally speaking most of the failures will surely have been non-crossing uses (electronically proving right to work/receive benefits/not have to ultimately pay/claim on insurance for non-emergency care).