I don't have the data but from what I have learned as an LTC investor, LTC was always late on a bull run, it will got it's bullrun few weeks after Bitcoin got the Bullrun much later compared to other Altcoins. So, for anyone who are only begin to get Litecoin, I guess they should be patient and wait.
This won't be the best option for impatient people otherwise, they will just sell them earlier.
And this is the reason why only a few people have the guts to invest in this project while the majority are into Bitcoin and some hyped projects because they think that LTC won't give a huge profit. I know that you know it but still you manage to keep it for the sake of not losing your money, that was really a huge support to the project. However, if we are practical investors, it is certain that we don't put money into a project that never gives us a satisfying return.
Yeah true, people who are a bit late usually end up not tending to wait and LTC goes up later than most. The reality is that, last time LTC got out of top 20 as well, I think I saw it bottom at 24th place, looking at it right now, it is 18th, and I have seen it go up as high as 11th as well. So as you can see, you need to be ready, during the bear run it is definitely one of the stronger ones and during one of the other bull runs the coins and tokens overcome it.
So you need to be careful, invest into whatever you want while you are waiting for bull run, and after the bull run starts and you make a profit, use that profit to buy LTC and you should be doing better, that is definitely a better way to make a profit.