>>>>>>But my question was : WHEN did that become the criteria......
>>>>>>
>>>>>>Oh, I see. The short answer is "I don't know."
>>>>>
>>>>>OK. I thought you were originally implying that the drop in the unemployment figures occurred because the government changed the criterion?
>>>>
>>>>Your singular was duly noted and appreciated.
>>>
>>>I put it at the top of my agendum :-}
>>
>>Hmm, not sure you want to be known as the chap who put the "dum" in "agendum" :-\
>
>Data: I don't understand the difference between singular and plural :-}

One piece of information is a datum, multiple are data.

It's easy to remember - just think of a "data point" < bg >