## tibble [102 × 3] (S3: tbl_df/tbl/data.frame)
## $ year_month: Factor w/ 11 levels "2025-07-01","2025-08-01",..: 1 1 1 1 1 1 1 1 1 1 ...
## $ foot : chr [1:102] "蹄底潰瘍" "白帯病" "趾間フレグモーネ" "ソールフラクチャー" ...
## $ value : chr [1:102] "0" "1" "0" "0" ...