A prospective cohort study followed $10,000$ adults over a one$-$year period to monitor the development of hypertension. At the start of the study, $1,500$ individuals already had hypertension and were excluded from the analysis. During the year, $350$ new cases of hypertension were diagnosed among the remaining participants.

What is the incidence of hypertension in this population over the one$-$year period?

$3\mathrm{.}5\%$

$2\mathrm{.}3\%$

$6\mathrm{.}2\%$

$5\%$

$4\mathrm{.}1\%$