The data set, as a flat rectangular CSV file, can be downloaded from here:

# install.packages("readr")
last_week_antibiotics <- readr::read_csv("https://raw.githubusercontent.com/viparc/residues/master/data/last_week_antibiotics.csv",
                                         col_types = paste(c("c", rep("i", 47)), collapse = ""))

For each flock (row, as identified by farm and flock), it shows the duration, in weeks, of the flock (flock_duration) as well as, for each antibiotic, the number of weeks since last use at the end of the flock.