change chart But the values ​​have changed.

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I'm using a pivot table, the resulting values.

MeasurementNo1 uses the code.

MeasurementNo2

MeasurementNo3

MeasurementNo4

MeasurementNo5

but changed to Line Chart 

The values ​​in the table have changed.

Exported the graph to Excel. will get a value like this

Why did the value change? I want the same value as the pivot table.