I have created a series of line graphs that are by(state). However, for some reason, the box for Connecticut is empty despite there being data in those cells of the dataset. There are other places where I'm missing lines for data that exists for that state and year but Connecticut is showing no lines and has data for all years. Hopefully, someone can help fix this.

Here is my code:
Code:
twoway(line grad_ratio_w year if year>2004 & year<2013, by(state) cmissing(n))(line grad_ratio_b year if year>2004 & year<2013, by(state) cmissing(n))(line grad_ratio_h year if year>2004 & year<2013, by(state) cmissing(n))(line grad_ratio_poc year if year>2004 & year<2013, by(state) cmissing(n))