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The source adds the following information: "Data refer to the share of women in total inventors of IP5 patent families, weighted by the number of families, by earliest priority date, corrected using 3-years moving average. Inventors' gender were identified using a gender-name dictionary (first names by country), following the methodology described in Lax Martínez, Raffo and Saito (2016). IP5 patent families are patents filed in at least two offices worldwide, one of which being any of the five largest IP offices: the European Patent Office (EPO), the Japan Patent Office (JPO), the Korean Intellectual Property Office (KIPO), the US Patent and Trademark Office and the National Intellectual Property Administration of People’s Republic of China (NIPA). Data for 2018 and 2019 are estimates based on available data for those years. A threshold has been applied to select countries: more than 50 inventors per year and more than 60% of inventor's names matched to gender. EU27 and OECD aggregates are built on countries where data meet the set threshold."