Getting a PivotChart to report all weeks

[rmb4466]

I've got a list of samples and would like to chart them, summarized by week number. Some weeks have 0 samples, some weeks have multiple samples. When I create a PivotChart, I can group it to summarize by weeks; however, it only displays weeks with samples and omits weeks with 0 samples. To the undiscerning eye, this makes it look like there have been a lot more samples than there really have been. I can create a larger list of all weeks represented and have it look up which weeks have samples, but this gets laborious when I start having multiple different sample types.

Is there a way to create a chart that is grouped by week number that displays all weeks from the start date to the end date, including those with 0 samples?

Here's an example much simpler, but analogous to my dataset:
[TABLE="width: 355"]
<colgroup><col><col><col><col><col><col></colgroup><tbody>[TR]
[TD]ID[/TD]
[TD]Year[/TD]
[TD]Weeknum[/TD]
[TD]Year.WeekNum[/TD]
[TD]Date[/TD]
[TD]Location[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]2017[/TD]
[TD="align: right"]43[/TD]
[TD="align: right"]2017.43[/TD]
[TD="align: right"]26-Oct-17[/TD]
[TD]LR[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]2017[/TD]
[TD="align: right"]44[/TD]
[TD="align: right"]2017.44[/TD]
[TD="align: right"]31-Oct-17[/TD]
[TD]Kit[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]2017[/TD]
[TD="align: right"]51[/TD]
[TD="align: right"]2017.51[/TD]
[TD="align: right"]23-Dec-17[/TD]
[TD]Kit[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]1[/TD]
[TD="align: right"]2018.01[/TD]
[TD="align: right"]3-Jan-18[/TD]
[TD]Kit[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]1[/TD]
[TD="align: right"]2018.01[/TD]
[TD="align: right"]4-Jan-18[/TD]
[TD]Kit[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]2018.05[/TD]
[TD="align: right"]30-Jan-18[/TD]
[TD]LR[/TD]
[/TR]
[TR]
[TD="align: right"]7[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]2018.05[/TD]
[TD="align: right"]3-Feb-18[/TD]
[TD]Kit[/TD]
[/TR]
[TR]
[TD="align: right"]8[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]23[/TD]
[TD="align: right"]2018.23[/TD]
[TD="align: right"]4-Jun-18[/TD]
[TD]LR[/TD]
[/TR]
[TR]
[TD="align: right"]9[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]24[/TD]
[TD="align: right"]2018.24[/TD]
[TD="align: right"]16-Jun-18[/TD]
[TD]Kit[/TD]
[/TR]
[TR]
[TD="align: right"]10[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]24[/TD]
[TD="align: right"]2018.24[/TD]
[TD="align: right"]14-Jun-18[/TD]
[TD]Kit[/TD]
[/TR]
[TR]
[TD="align: right"]11[/TD]
[TD="align: right"]2018[/TD]
[TD="align: right"]27[/TD]
[TD="align: right"]2018.27[/TD]
[TD="align: right"]3-Jul-18[/TD]
[TD]Kit[/TD]
[/TR]
</tbody>[/TABLE]

Thanks.