Remove "last complete year" and 5-year counts columns

[jmelot]

Closes #445 Closes #453

[github-actions[bot]]

No need for rebasing :+1: behind_count is 0 ahead_count is 2

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
637	425	67%	0%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
web/scripts/retrieve_data.py	61%	🟢
TOTAL	61%	🟢

updated for commit: 9e729f0 by action🐍

[github-actions[bot]]

JavaScript Coverage

Summary

Lines	Statements	Branches	Functions
	67.96% (420/618)	55.61% (223/401)	69.94% (135/193)

Modified Files • (67%)

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	67.96	55.61	69.94	67.75
static_data	81.81	78.26	80	80.39
data.js	100	100	100	100
table_columns.js	81.13	78.26	80	79.59	201–314, 562–563