Clarification of terminal-phy-protocol-stats/fec-uncorrectable-blocks

[proberts2022]

Within openconfig-terminal-device.yang, the grouping terminal-phy-protocol-stats is defined to report a set of statistics about the operation of the Forward Error Correction. And this group is used both for the optical channel component, the logical-channel OTN and the logical channel Ethernet.
Within the group there are several attributes that use an "avg-min-max-instant-stats-xxx" type that allows for the reporting of intervalized statistics.
Within the CMIS specification for transceivers, these statistics are supported as VDM Observable Types and support include reporting of the avg, min, max, and current value over an interval. This part lines up nicely.

The fec-uncorrectable-blocks attribute is defined within openconfig to be a simple counter64 and not a interval stats type. The description of this attribute is "The number of blocks or frames that were uncorrectable by the FEC"

Within CMIS, this appear to relate to the Frame Error Count (FERC) and that is also VDM Observable type with a min, max, avg, and current value. Also in CMIS 5.2 (April 2022) a "Total Accumulated" value was also added.

Question: Which of the following value from CMIS should be used to populate the fec-uncorrectable-blocks?
FERC Sample Average
FERC Current Sample Value
FERC Total Accumulated
or is some other computation to be used for this fec-uncorrectable-blocks attribute?