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The file can be produced as follows from the source file with sha512sum 97d4bbb830c105d0fc292d1828e0dc9a6ed52243c65e91bf5cd6fbb584d2a67446e8f4d2f70bde8eb529fb7d40318bd4cc1935567c31a19acc942f8a4cd47551.

#!/bin/bash
# extract_dem_v_core.sh Copyright (C) 2025 CC-BY SA 4.0 Boud Roukema
# See https://creativecommons.org/licenses/by-sa/4.0 for details.

# apt-get install plotutils # to install 'graph'

# Data source:
# https://web.archive.org/web/20260509191839/https://www.v-dem.net/media/datasets/V-Dem-CY-Core-v16_csv.zip
# sha512sum: 3bc84f3f87e995e174d899fbd57b2cf8e8de1f07774b962753cacb0fe272469183979eab72fbd7b2c9a3c12e8b1750537a2fbdcf8fdbf1feb9f049872198412a
# https://web.archive.org/web/20250612224128/https://www.v-dem.net/media/datasets/V-Dem-CY-Core-v15_csv.zip
# sha512sum: 97d4bbb830c105d0fc292d1828e0dc9a6ed52243c65e91bf5cd6fbb584d2a67446e8f4d2f70bde8eb529fb7d40318bd4cc1935567c31a19acc942f8a4cd47551

DEMV_VERSION=15
FILE=V-Dem-CY-Core-v${DEMV_VERSION}.csv

#COUNTRY="FRA"
#COUNTRY="HUN"
COUNTRY="POL"
#COUNTRY="USA" # check against https://commons.wikimedia.org/wiki/File:V-Dem_Electoral_and_Liberal_Democracy_Indices_for_the_United_States,_1900%E2%80%932024.svg
FONT="HersheySerif"
FSIZE=0.04
MARGINS="-r 0.15 -w 0.8 -u 0.1 -h 0.85"
XLAB=year
YLAB="DemV index (solid: elec dem; dotted: lib dem)"
FSIZE=0.04

# head -n 1 V-Dem-CY-Core-v15.csv |sed -e 's/\",\"/\"\n\"/g' | nl -ba |less

#     1  "country_name"
#     2  "country_text_id"
#     3  "country_id"
#     4  "year"
#    23  "v2x_polyarchy"
#    27  "v2x_libdem"
#    31  "v2x_partipdem"
#    35  "v2x_delibdem"
#    39  "v2x_egaldem"

if ! [ -e tmp.${COUNTRY} ]; then
    tail -n +2 ${FILE} | sed -e 's/\",\"/\";\"/g' \
                             -e 's/\",\([0-9]\)/\";\1/g' \
                             -e 's/\([0-9]\),/\1;/g' \
                             -e 's/,,/;;/g' \
                             -e 's/,,,/;;;/g' \
                             -e 's/;,/;;/g' |
        awk -F ";" -v c=\"${COUNTRY}\" '{if($2==c)print $2,$4,$23,$27}' > tmp.${COUNTRY}
fi

# Individual hacks for missing data per country: look at tmp.${COUNTRY}
# and list the years for which ratings are missing.
case "${COUNTRY}" in
    POL)
        grep -vE " (1807|1808|1867)"  tmp.${COUNTRY} > tmp.${COUNTRY}.has_data
        ;;
    *)
        cp -pv tmp.${COUNTRY} tmp.${COUNTRY}.has_data
        ;;
esac

(awk '{print $2,$3}' tmp.${COUNTRY}.has_data; printf "\n"; \
 awk '{print $2,$4}' tmp.${COUNTRY}.has_data) | \
    graph -Tsvg -X "${XLAB}" -Y "${YLAB}" -F ${FONT} -f ${FSIZE} > \
          DemV_2024_${COUNTRY}.svg