Sounds like you're doing a great job already. Well done.
Based on the continuous increase in growth, and assuming that there is a growing market for your product, it shouldn't be too difficult to find an investor.
What you would need is to create 2 investor pitch decks (presentations): one which you use when presenting in front of them, and one which you send to them (they are similar but not the same). The pitch deck that you send to them needs to be perfect as you only have one chance.
There are a lot of lists available of investors. It depends which country you're located in and where your target market is.
I've successfully helped over 300 entrepreneurs and would be happy to help you if you need. After scheduling a call, be sure to please send me some background information so that I can prepare before - thus giving you maximum value for your money during the call itself.