HMS, HIC EQ-Bank 019 MC

The table below shows data for a particular health condition in Australia:

\begin{align*}
\begin{array}{|l|l|l|l|}
\hline
\rule{0pt}{2.5ex}\textbf{Year}\rule[-1ex]{0pt}{0pt}& \textbf{Existing Cases} & \textbf{Population}& \textbf{New Cases}\\
\hline
\rule{0pt}{2.5ex}\text{2020}\rule[-1ex]{0pt}{0pt}&\text{50,000}&\text{10,000,000}&\text{5,000}\\
\hline
\rule{0pt}{2.5ex}\text{2021}\rule[-1ex]{0pt}{0pt}& \text{54,000}& \text{10,200,000}& \text{5,200}\\
\hline
\end{array}
\end{align*}

What was the prevalence rate (per 100,000 people) of this condition in 2021?

1. 51.0
2. 529.4
3. 5,200
4. 54,000