Listed below are past division winners in the NBAs Eastern Conference. What was the HHI for the Atlantic Division?

Year

Atlantic

Central

Southeast

$2013-14$ Toronto Indiana Miami

$2014-15$ Toronto Cleveland Atlanta

$2015-16$ Toronto Cleveland Miami

$2016-17$ Boston Cleveland Washington

$2017-18$ Toronto Cleveland Miami

$2018-19$ Toronto Milwaukee Orlando

$2019-20$ Toronto Milwaukee Miami

$2020-21$ Philadelphia Milwaukee Atlanta

$2021-22$ Boston Milwaukee Miami

$2022-23$ Boston Milwaukee Atlanta

Question $12$ options:

$4\mathrm{.}6$

$1\mathrm{.}0$

$3\mathrm{.}5$

$4\mathrm{.}1$