Why the last 8 items of table2 are not zeros?

  const simd8<uint8_t> table1(16, 0, 0, 0, 0, 0, 0, 0, 0, 8, 12, 1, 2, 9, 0, 0);
  const simd8<uint8_t> table2(8, 0, 18, 4, 0, 1, 0, 1, 0, 0, 0, 3, 2, 1, 0, 0);

I checked the 2019 paper(https://arxiv.org/abs/1902.08318) and following 3.1.2 I created a table similar to Table 1:

From my understanding, the last 8 items in table2 should be corresponding to characters >= 0x80 and will never be used in json_character_block::classify. And I don't think there's anything related to UTF-8 here.. Do I miss anything?