To give you a different perspective in an answer I will tell you that when viewing such a topic, you should take a moment to broaden your view. Even if every single aspie girl in the world were taken right now, understand that it means little to nothing in the way of a statistical fact. Relationships don't always last unfortunately. And yes, I am going somewhere with this so stick with me a second.
First off, men have different standards, views and tolerances than women. We are all created equal but that doesn't mean we are the same. Most men find the aspie female more attractive than women finding aspie men attractive due to the mannerisms first seen from people on the spectrum. When asked, most normal women will say that the most attractive quality in a man is confidence which is a problem with a lot of aspie men because it's either an undershoot or an overshoot between broody and boasting. Men, statistically, have lower and broader standards than women when it comes to behavior (though higher when it comes to looks). Not to say that being an aspie qualifies as a low standard but it does mean that the opposite gender being considered weird or strange doesn't bother the average male as much as it bothers a female.
But that only refers to the initial attraction. Keeping a relationship is a whole different matter. I would estimate that around 95% of aspie women will have at least one relationship in their life. Most will have multiple relationships. It is very possible that as you meet new people you will statistically run into more who are in relationships than not because a relationship is sought after like the holy grail in most cases. You shouldn't take that as an all or nothing view however. One of the things that I've known to be a trait among people like us is the extremist thinking, using broad blanket statements where we categorize things in large chunks out of simplicity and/or frustration.
In the bigger picture, aspie women go through many struggles in relationships; struggles that we as men could not understand. They will go through break ups and heart breaks just like everyone else but they will internalize differently than others. We as men must not get frustrated with the apparent appearance of being left out of all the good stuff. Yes, it seems like it is easier for an aspie woman to get a boyfriend than the other way around but don't be too quick to covet such a thing. Relationships can be great but they are also a gamble; and each time you roll that dice, you have a chance to get pain as well as happiness.
If you are hoping for an aspie girl (doesn't matter if you are or not, I'm going to mention this for statistic's sake) then don't fret because even if they are all taken, it won't stay that way for long. Because the same mass male population that will date an aspie for their adorable qualities may find that they aren't up to the task of loving them like they deserve. Truth is, most males aren't man enough to dedicate to someone who is different. Unfortunately we live in a time where the typical male just assumes women are crazy and simply tolerate that crazy for a temporary amount of time until something better comes along. This is outside of whether or not they are on the spectrum. Understand that the appearance of aspie women getting more relationship attention than us men should come with the understanding that they will statistically receive more heart ache than us.
If you are to look into this concept; the whole idea of them being always taken, try to separate yourself from the equation and think in these terms: If a woman with aspergers is in a relationship, give hopes that the man treats her right. If he does not, give hopes that she is given the strength to move on from him or that he has the strength to change. If they all are taken, wish them all the best; wish them all love and kindness in their own lives. Any negative feeling beyond that (usually) comes from when we put ourselves in the equation.
And I understand curiosity but I also am familiar with curiosity as it comes from a underline frustration. Wether or not this speaks to you is moot. While you may be more bored curious, another reading this thread may be frustrated so I like to cover grounds if that's alright with you. Remember, the now is temporary. What you see today means so little in the big picture. We only perceive small views as individuals and we have such short grasps on the flow of time.