How many entries exist for each party's governments and each decade. This shows where the record is thin, so a quiet period reads as a gap in coverage, not as inactivity.
ISRO was formed in 1969 from the 1962 INCOSPAR committee, and a Space Commission and Department of Space were created in 1972, placing the space programme under dedicated government structures.
In June 2020 the Union Cabinet approved opening space activities to private firms through IN-SPACe as a regulator and promoter, with NSIL as ISRO's commercial arm.