Listed below are the division winners in MLB$\text{'}$s National League between $2014$ and $2023.$ What was the HHI for the NL East over this period?

$\backslash$table$[[$Year$,$NL East,NL Central,NL West$],[2014,$Nationals,Cardinals,Dodgers$],[2015,$Mets,Cardinals,Dodgers$],[2016,$Nationals,Cubs,Dodgers$],[2017,$Nationals,Cubs,Dodgers$],[2018,$Braves,Brewers,Dodgers$],[2019,$Braves,Cardinals,Dodgers$],[2020,$Braves,Cubs,Dodgers$],[2021,$Braves,Brewers,Giants$],[2022,$Braves,Cardinals,Dodgers$],[2023,$Braves,Brewers,Dodgers$]]$

$1\mathrm{.}0$

$3\mathrm{.}5$

$4\mathrm{.}6$

$15\mathrm{.}3$