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This was only the third launch for Northrop Grumman this year, which matches its total last year and has been its typical count for the past decade and a half. Previously that number was mostly Pegasus launches. Now it is the Antares/Cygnus launches to ISS, as Pegasus has lost most of its business.
The leaders in the 2019 launch race:
6 Europe (Arianespace)
The U.S. now leads China 22 to 20 in the national rankings.