Here are the stats for people of Indian origin who have applied for a green card and waiting due to the current backlog.

Primary applicants from India for each year

Sources for the data is from the official Gov Agencies

FY 2009 https://www.foreignlaborcert.doleta.gov/pdf/2009_Annual_Report.pdf Page 19
FY 2010 https://www.foreignlaborcert.doleta.gov/pdf/OFLC_2010_Annual_Report_Master.pdf Page 25
FY 2011 https://www.foreignlaborcert.doleta.gov/pdf/2011AR_FINAL.pdf Page 24
FY 2012 https://www.foreignlaborcert.doleta.gov/pdf/OFLC-2012_Annual_Report-11-29-2013-Final%20Clean.pdf Page 24
FY 2013 https://www.foreignlaborcert.doleta.gov/pdf/OFLC-2013_Annual_Report.pdf Page 27
FY 2014 https://www.foreignlaborcert.doleta.gov/pdf/OFLC_Annual_Report_FY2014.pdf Page 22
FY 2015 https://www.foreignlaborcert.doleta.gov/pdf/OFLC_Annual_Report_FY2015.pdf Page 22
FY 2016 https://www.foreignlaborcert.doleta.gov/pdf/OFLC_Annual_Report_FY2016.pdf Page 21
FY 2017 https://www.foreignlaborcert.doleta.gov/pdf/PerformanceData/2017/PERM_Selected_Statistics_FY2017.pdf

Green card applicant distribution by profession