Sonic characters birthdays

I looked up some of the Sonic characters birthdays. Only a few had the year that they would have been born in.

Sonic- June 23rd, 1976
Tails- October 16th, 1984
Knuckles- February 2nd, 1978
Amy-  October 6th, 1985
Cream- May 9th, 1996
Shadow- June 19th, 1951
Rouge- October 31st, 1974
Espio- March 6th, 1979
Charmy- December 27th, 1989
Vector- August 9th, 1975
Jet- July 6th, 1992
Wave- 1988
Storm- 1987
Silver- April 5th, 2198
Blaze- June 19th, 1999
Dr. Eggman- April 28th
scourge- August 28th
Tikal- December 23rd

If anyone can find me the years for the ones I have that don't have years I will be grateful.
An If anyone can find the Month, date and year for the following i will be grateful.

Cosmos
Marine
Mephiles