Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| block | launched | operational | not usable | retired | launch failures |
| block i | 11 | 0 | 0 | 10 | 1 |
| block ii | 9 | 0 | 0 | 9 | 0 |
| block iia | 19 | 8 | 1 | 10 | 0 |
| block iir | 13 | 12 | 0 | 0 | 1 |
| block iirm | 8 | 7 | 0 | 1 | 0 |
| block iif | 4 | 4 | 0 | 0 | 0 |
| total | 64 | 31 | 1 | 30 | 2 |
Title:
none
Statement:
with 0 retired and less than 1 launch failure , the average number of not usable is 0
Answer:
supported