連合割合%の表示が1000件以上のインスタンスでNaNになる不具合の修正

[kozakura913]

What

Number("1,000")===NaNの問題を修正する

Why

#437 で実装した表示が計算対象の数が1,000を超えてるとNaNになってしまう問題

Additional info (optional)

Checklist

• コントリビューションガイドを読みました( Read the contribution guide)
• ローカル環境で動作しました(Test working in a local environment)
• (必要なら)CHANGELOG_YOJO.mdの更新((If needed) Update CHANGELOG_YOJO.md)
• (必要なら)テストの追加((If possible) Add tests)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 20.20%. Comparing base (de66bbf) to head (9fa335f).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/frontend/src/scripts/use-chart-tooltip.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #462       +/-   ##
============================================
- Coverage    38.69%   20.20%   -18.50%     
============================================
  Files         1662      787      -875     
  Lines       217452   117200   -100252     
  Branches      2849     1088     -1761     
============================================
- Hits         84148    23679    -60469     
+ Misses      132695    92933    -39762     
+ Partials       609      588       -21     

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