how do i fix this error? i am trying to split a dataset into $4$ groups in sas studio for academics

$94$ IF YEAR THEN GROUP $=1$;

$95\{\begin{array}{cc}\text{:}[\frac{?}{\text{b}\text{a}\text{r}}& (180)]\\ \frac{?}{\text{b}\text{a}\text{r}}& (180)\\ \frac{96.}{b}ar& (LSE)IF\text{Y}\text{E}\text{A}\text{R}1969\text{T}\text{H}\text{E}\text{N}\text{G}\text{R}\text{O}\text{U}\text{P}& =2\text{;}\\ \frac{97}{b}ar& (180)\\ \frac{?}{\text{b}\text{a}\text{r}}& (180)\end{array}$

ERROR $180-322$: Statement is not valid or it is used out of proper order $98$ RUN;. $1948-1969,1970-1984,1985-2007,$ and $2008-2019$