The List Size Over Time Report displays the size of a given list over a period of time. It tracks both the total number of subscribers on the list as well as the email status of these subscribers (unsubscribed, undeliverable, etc). This report functions better over longer periods of time, so use the report to measure list growth over periods of 1 month or longer. Shorter time spans may reflect inconsistent results due to the smaller time frame.
Note: A subscriber may rarely move in and out of Bounced and Held statuses. For example, if a full inbox causes a message to bounce but a later attempt to send is successful, or if a held subscribers clicks a link in an old email. If this happens, the Bounced and Held values for a time period can change over time.

The List Size Over Time Report contains a table and a graph to illustrate the data on the report. The table contains the following information:
| Column | Description |
|---|---|
| Month | This column divides the time period of the report into months. |
| Subscriber Count | The number of subscribers on the list during the Month. |
| Subscriber Count Added | The number of subscribers added to the list in during the Month. |
| Subscriber Count Bounced | The number of subscribers in Bounced status during the Month. |
| Subscriber Count Held | The number of subscribers held on this list during the Month. |
| Subscriber Count Unsubscribed | The number of subscribers unsubscribed from this list during the Month. |
Run the List Growth Over Time Report to evaluate the performance of a list over time.
Use the following steps to run the report:
| Start Date | The first date for which information is included in the report. |
|---|---|
| End Date | The last date for which information is included in the report. |
| Date Range | This field is available only if you are using a report activity. Valid values include:
|
| Exclude Single Sends | Determines whether the report includes information for single sends-a special kind of send that can be initiated only by an API call. |
| List | The list whose performance is analyzed by the report. You can only select lists that were sent to between the start date and end date. |
| Time Zone | The timezone in which you wish the results of the report to appear |
| Date Format | The format in which dates appear in the report |
This page was last updated by Adam Evans.
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