Solve for the unknown number of years in each of the following: $($Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

$\backslash$table$[[$Present Value,Years,Interest Rate,Future Value$],[$$$,10,\%,$$$,1,142],[710,,11,\%,1,553],[17,400,,16,\%,203,139],[20,500,,13,\%,249,238]]$