REUTERS Natural gas stocks in Ukraine&#39;s underground storage facilities (USFs) have shrunk by 1%, to 21.53 billion cubic meters (bcm) since November 2, when Ukraine started pumping out gas from its reserves amid the heating season. Read alsoIn new suit against Gazprom, Naftogaz demands transit tariff review As of November 16, 2019, gas reserves in the country&#39;s USFs stood at 21.53 bcm, which was 27% up from 16.9 bcm as of November 16, 2018, the state-run gas transport system operator Ukrtransgaz said. In particular, 19.12 million cubic meters (mcm) of gas was withdrawn from the storage facilities on November 16 alone. The country&#39;s USFs were filled by 69% as of November 16. As UNIAN reported earlier, on November 2, Ukraine stopped injecting gas into the underground storage facilities and began pumping it out to ensure the smooth 2019-2020 heating season. By the start of the current heating season, Ukraine had accumulated 21.76 bcm of gas in its underground storage facilities against 17.2 bcm reported before the start of the 2018-2019 heating season. Earlier, NJSC Naftogaz of Ukraine said the country needed to accumulate at least 20 bcm of gas in its USFs to pass the forthcoming heating season.