I have no idea when they were kicked out. Although, it seems they didn't have time to have children yet. But what about taking this from a different point in time...
Even if we can't determine how many years it has been since Adam, can we approx. determine how many years since the birth of Christ (according to the Hebrew 360 calendar days/year)?
I'm terrible with numbers, but here it is...
2006 x 365 days/year = 732,190 days since birth of Christ
732,190/360 days per year = 2033.86
If it is around the year 2033.86 according to a 360 day calendar year, (I don't even know how to incorporate leap years!), could the 1000 year Millennial Sabbath come very soon (if this 1000 year rest begins after 2000 years from the resurrection or from the Pentecost)?
Also, does the 1000 reign begin with the rapture or with Christ's physical presence on earth?