They dropped the ball on military investments (which were MASSIVE), see their report ( https://www.ccomptes.fr/en/documents/1134 ), page 35: «Le champ d’analyse ne couvre pas les dépenses de recherche relevant du domaine militaire, ni celles se rattachant à la recherche fondamentale».
Even the cost of civilian research (from the 50's to 2012) is very difficult to assess («les données recueillies ne sont pas toutes homogènes et leur fiabilité n’est pas totale.»).
Ballpark figures (page 270): 288 billions euros (value: 2010) invested, 118 of them being directly production-related investments (maintenance is not accounted for), with severe methodological restrictions («Il est difficile aujourd’hui de 'reconstruire' l'histoire du financement»), tackled by using conventions inherited from the nuclear industry.
Even the cost of civilian research (from the 50's to 2012) is very difficult to assess («les données recueillies ne sont pas toutes homogènes et leur fiabilité n’est pas totale.»).
Ballpark figures (page 270): 288 billions euros (value: 2010) invested, 118 of them being directly production-related investments (maintenance is not accounted for), with severe methodological restrictions («Il est difficile aujourd’hui de 'reconstruire' l'histoire du financement»), tackled by using conventions inherited from the nuclear industry.