Approximately How many Sentients are in the Star Wars Galaxy?

I have been searching around the web for approximate numbers of sentiments in the Galaxy. I found the following pages: List of Star Wars species A-E, List of Star Wars species F-J

The problem is that they do not even give estimates of the number of sentient individuals in the Galaxy. I am unaware of any canon there the numbers are estimated except in the trillions. I am looking for a more exact numbers (eg 900 trillion) I don't know if this is too broad of a question but I am very curious as to the numbers because of the mentioning of hundreds of trillions of dead sentiments in the Yuuzhan Vong war and similar discreet statements. How many sentients are there in the Star Wars Universe?