Always remember, your bargaining power is pretty much exclusively driven by what will happen if they say no. If you ask for something and your boss knows nothing you'll still work here if he says no, he'll say no. Guaranteed. If he knows you'll leave but you're cheaper to replace than the amount you're asking for, he'll say no. Guaranteed.
Quite possibly it worked differently in the past. I heard that companies used to want to keep their employees happy. Now they don't. Now they are driven robotically by spreadsheets and want maximum work for minimum cost. You cannot appeal to human factors.
If you have received offers for (let's say a round number) $200,000 and your job is paying you $100,000, you have basically nothing to lose by demanding an immediate raise to not only $200,000 but even $225,000. Sure, they can fire you for asking, but it's not like you'll care, since you can quit your job and go work at the other job. I did exactly this, they laughed at my number, I quit and now I work somewhere else. If you particularly like your job, you could lower your demand by a bit, but money is money.
On the other hand, if you'd have to go and find a new job then you have more to lose. Your risk tolerance level is ultimately up to you, and it depends on how you view the job market - whether you're pretty sure you could get a new job in a couple of months, or not sure at all.
I cannot directly ask for a raise as they will tell me "We'll see that on the annual review on December"
Your boss's job is to pay you as little as he can. Seriously. That's one of the things he gets paid for. That means he will keep feeding you bullshit excuses as long as the bullshit excuses are going to make you stop asking for a raise for a while. Keep this in consideration.
Some companies have pre-set raise schedules. They basically act as a company-wide bullshit excuse and they are inevitably lower than what you could get on the open market. I guarantee you will not get a raise next year either unless it's on the schedule. Then your boss will once again tell you "maybe next year" and you will have waited one and a half years.
If the job market is as good as you say it is, you can walk right up to him and ask for an immediate raise or you'll put in your two week's notice right now. He will say no, then perhaps the two of you will agree on some relatively small concession like: "okay, I will give you a few days to arrange this raise or else I will put in my two weeks notice right then". Maybe he'll come back with half the raise, and then you say: "this is half of what I demanded, give me what I demanded" and he says, "no," and you say "sorry, I'm going to accept the other offer, here is my two weeks notice." Or he says yes, and then you have your raise.
This is how companies treat employees. Companies get very rich by doing this. Don't be afraid to do the same back to them - if you can afford to gamble your job. You say the job market is very good - so I'm assuming you can.