Per Zauba, India has exported
~997cr of gNexium to US (from Mar 01, 2015 to Nov 12, 2015)
~252cr of gNexium to US (from Oct 21, 2015 to Nov 12, 2015)
Attached file has the related raw data to chew.
Esomeprazole Magnesium v1.xlsx (30.9 KB)
Note: In addition to Torrent and Hetero, the above numbers would include Cipla's gNexium supply to Teva.