[Juha]

My 2016 MBP shows very similar numbers, though my % is even higher (26%):

  SMART/Health Information (NVMe Log 0x02)
  Critical Warning:                   0x00
  Temperature:                        30 Celsius
  Available Spare:                    88%
  Available Spare Threshold:          2%
  Percentage Used:                    24%
  Data Units Read:                    356,923,637 [182 TB]
  Data Units Written:                 354,603,847 [181 TB]
  Host Read Commands:                 2,817,724,668
  Host Write Commands:                2,270,199,931
  Controller Busy Time:               0
  Power Cycles:                       21,443
  Power On Hours:                     996
  Unsafe Shutdowns:                   21
  Media and Data Integrity Errors:    0
  Error Information Log Entries:      0