Returns the DC limit as defined in 415(c) for the year specified.
GETDCLIMIT(Year, IncreaseRate)
Year: the year of the desired compensation limit.
IncreaseRate: the annual assumed increase rate for the unrounded limit (for example, 3.5% should be specified as 0.035).
GETDCLIMIT(YEAR(NRD), 0.035) returns the 415(c) catchup limit at NRD assuming an increase rate of 3.5%