## tibble [168 × 3] (S3: tbl_df/tbl/data.frame)
## $ year_month: Factor w/ 11 levels "2024-06-01","2024-07-01",..: 1 1 1 1 1 1 1 1 1 1 ...
## $ foot : chr [1:168] "趾間皮膚炎" "蹄底潰瘍" "白帯病" "趾間フレグモーネ" ...
## $ value : chr [1:168] "0" "0" "1" "0" ...