8-10 years depending on how many jobs are involved. Normally I would look at the types of jobs listed and evaulate them based on the job I am interviewing for, then see if I need to go back further. Most times I don't.
Way back!
Washington State requires employment background checks to go back seven years.
California background checks typically go back 7 years for criminal records, employment history, and credit reports. Certain exceptions may apply for positions requiring a higher level of security clearance.
5,000
I have no clue
Traces do not go back that far in history.
In 1892, John Froelich invented and built the first gasoline/petrol-powered tractor in Iowa. The history of the engines with in tractors go back as far as 1850.
14000 ago
Make that several thousand years!
The history of human flight doesn't go very far back in time.
In Michigan, background checks typically go back seven years for criminal history and employment verification. More comprehensive checks may include information dating back further, but this can vary depending on the type of background check being conducted and the specific requirements of the employer or organization.
I haven't seen a history text book in many years, so my information goes only as far as I can remember.