Let's assume that we are going to insert $14$ items into an empty HashSet.

Let's assume from our hash function, that each item was mapped to the following respective bucket.

Item $1$ mapped to bucket $2.$

Item $2$ mapped to bucket $12.$

Item $3$ mapped to bucket $1.$

Item $4$ mapped to bucket $4.$

Item $5$ mapped to bucket $5.$

Item $6$ mapped to bucket $4.$

Item $7$ mapped to bucket $2.$

Item $8$ mapped to bucket $2.$

Item $9$ mapped to bucket $1.$

Item $10$ mapped to bucket $3.$

Item $11$ mapped to bucket $6.$

Item $12$ mapped to bucket $20.$

Item $13$ mapped to bucket $18.$

Item $14$ mapped to bucket $15.$

After inserting $14$ items, what is the current usage of the HashSet?