It is estimated that \( y \), the number of items of a particular commodity (in millions) sold in the United States in year \( \mathrm{x} \), where \( \mathrm{x} \) represents the number of years since 1990 , is given by the formula \( y=1.23 x+4.5 \). That is, \( x=0 \) represents \( 1990, x=1 \) represents 1991, and so on. According to the formula, how many items sold in \( 1996 ? \)
13.11 millions
4.5 millions
11.88 millions
34.38 millions