Chi square/mcnemars or Cochran's Q test

#1
Hello All,
I have this scenario.
Year Num_Insured Num_claims Proportion
2015 50 20 0.4
2016 120 40 0.33
2017 140 110 0.79

I want to test whether the proportion of num of claims to num of insured (proportion column) remains the same throughout the years

There could be common customers from one year to the next so I assume that makes this a dependent groups so I cannot conduct a regular chi square. I am thinking if Cochran's Q test will work here; am I assuming correctly that mcnemars wont here as it is 3 or more years (3 or more groups?)). Any ideas on how to solve this would be greatly appreciated.

Regards