I have a data set that represents a report from a instrument.

The instrument does not report values every time entry, so i want the value
at the next time entry to read the previous...(ex. 2.20.0, 2.21.1 to 1.41)
until the next value entry from the instrument (1.73)
I could do this manually but my data file is large and I wondered if there
is a function or a macro that will address this issue.

time (t) value

02:14.6 1.41
02:20.0
02:21.1
02:21.5 1.73
02:24.5
02:51.0
03:22.8 1.11
03:33.4
03:39.8
03:43.2
03:54.1
04:10.5
04:16.3 1.34