git log --format=%ad --date=format:%Y | sort -h | uniq -c | gnuplot -p -e "set terminal pngcairo size 800,600 enhanced font 'Segoe UI,10'; set output 'commits-per-years.png'; set yrange [0:]; set title 'Nombre de commits par année'; set style data histogram; set style fill solid border -1; set grid; plot '< cat -' using 1:xtic(2) notitle;"