Counting the Decades

It all depends on how you count, but I think we have not just entered a new decade. That happens next New Year's day.
Consider yourself at the beginning of time. There has been zero time before you were suddenly aware of your existence and one of the first things you want to do is keep track of time so you invent the calendar on day one of your existence. You have a choice what year you will write on your calendar, above where you write January 1. Would you put a 'zero' there because there has not yet been any time, or would you put one there because it is the first year? I think most people would agree that there was not a year zero, but there was a year 'one', or the first year.
If you called the first year 'One', then there had to be ten years passed before a decade was over and a new one began. Year two was called 'two' etc. When ten years had passed, the first decade was over and the very next year was the beginning of the new decade and that would be year 'Eleven'. (Count them on your fingers if you have to.) Therefore, our new decade starts in 2011, next year. We are really only in the tenth year of the present decade.