My big line of best fit (0-21) is definitely decreasing, it is going down very gradualy at the beginning and more slowly at the end, which makes a lot of sense since the discoveries of how to hell cancer are getting minor because so much progress was made from 1192-2004. Thought this line is pretty constant, and decreasing. I can also analize that the decreasing trend is stabilizing through the years.
The orange trend show year 0-6, it deacreases of 5.2 which is a lot in 7 years, is this trend there is no real outlier, but when we analyze it more carefully we can see that the beggining decreasing the middle increasing a very little bit until the end where it goes back normal.
The red trend lasts from 7-15. This is the trend that shows the little outlier which I explained in details above.there is a change from 88.2-80.2 so 8 of difference. Most of it is deacreasing except after the outlier.
The blue trend is stabilizing it is only deaceasing, there is no incrasing at all, it is different than all the other lines. The blue line is the last one it is a difference of 13.4though is really decreasing a lot, more than the other trends