Running total same as previous if blank

Hi All.

Im currently trying to make a DAX Command which wont leave running total value blank if there is no value in the given year/week.

Currently I have the following graph where the problem is well illustrated:

Im useing the following columns on my axis' and as legend:

X-axis: Merged year and week column. Given in text format.

Y-Axis: Quick-Measure for running total:

AcumulatedStatus = 
CALCULATE(
            COUNTA('UseData'[Status]),
            FILTER(
                        ALLSELECTED('UseData'[Change-Year-Week]),
                        ISONORAFTER('UseData'[Change-Year-Week], MAX('UseData'[Change-Year-Week]), DESC)
            )
)

Legend: Status column (The column consists of 3 text values, shown on each line in above graph)

I need help to write a measure/make changes so I wont have gaps between data points on the graph.

Thanks in advance. 

Best regards,

Andreas.