def _get_latest_raw_pdf(cls):
    """Given an ETL class, return the latest PDF in the data directory."""

    # Get PDF paths for the raw data files
    dirname = cls.get_data_directory("raw")
    pdf_files = dirname.glob("*.pdf")

    # Get the latest
    latest = sorted(pdf_files)[-1]
    year, month = map(int, latest.stem.split("_"))

    return year, month