How many years of experience do I have on aws services now?

Usually I tell others that I have about 5 years experience of aws services. Today I want to know more about how many years experience I have. I logged in my aws account and tried to find my account creation date. There is no such information in account page. I was so eager to find the information and searched for alternative way to get that information. The easiest way is good one, however I already deleted the email. The closed one is a good option for me now.

Here is my earliest billing month Feb 2013. Now I almost have 10 years experences of using aws services.

In the early days, there was no such thing as terraform etc. I usally manually practiced several core aws services and deleted those resources after practices.