<Li> odd numbers from 11 through 99 . </Li> <P> As an example, group number 98 is issued before 11 . </P> <P> The last four digits are serial numbers . They represent a straight numerical sequence of digits from 0001 to 9999 within the group . </P> <P> The Social Security Administration does not reuse Social Security numbers . It has issued over 450 million since the start of the program, and at a use rate of about 5.5 million per year it says it has enough to last several generations without reuse or changing the number of digits . However, there have been instances where multiple individuals have been inadvertently assigned the same Social Security number . </P>

What do last 4 digits of social security number mean
find me the text answering this question