added population living difference queries

[codecov[bot]]

Codecov Report

Merging #77 into master will decrease coverage by 1.1%. The diff coverage is 0%.

@@             Coverage Diff             @@
##             master     #77      +/-   ##
===========================================
- Coverage      7.81%   6.71%   -1.11%     
  Complexity        9       9              
===========================================
  Files            12      12              
  Lines           371     432      +61     
  Branches         19      22       +3     
===========================================
  Hits             29      29              
- Misses          341     402      +61     
  Partials          1       1

Impacted Files	Coverage Δ	Complexity Δ
...main/java/com/napier/sem/PopulationReportView.java	0% <0%> (ø)	0 <0> (ø)	:arrow_down:
...ain/java/com/napier/sem/CapitalCityReportView.java	0% <0%> (ø)	0 <0> (ø)	:arrow_down:
src/main/java/com/napier/sem/App.java	5.3% <0%> (-0.76%)	6 <0> (ø)
...java/com/napier/sem/PopulationReportGenerator.java	0% <0%> (ø)	0 <0> (ø)	:arrow_down:

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