Looks like Objective C finally surpassed Fortran and Cobol somewhere in 2011. Good luck to you in the future ;-)
http://www.google.com/trends/explore#q=%22objective%20C%22%2...
And the CDROM wasn't a blip in history between the Compact Cassette and now? BTW the CD-ROM is still way more popular than Objective-C.
http://www.google.com/trends/explore#q=cd%20rom%2C%20objecti...
But nice try anyway.
(Actually, it appears Objective-C is certainly older than the CD-ROM and is from about the same era as the audio CD.)