A machine has a $32-bit$ address space and an $8-KB$ page. The page table is entirely in hardware, with one $32-bit$ word per entry. When a process starts, the page table is copied to the hardware from memory, at one word every $100\: nsec.$ If each process runs for $100\: msec$ (including the time to load the page table), what fraction of the $CPU$ time is devoted to loading the page tables?