The default number of items that will be returned by the Analytics API is 10.
By using the limit and offset parameters, the number of items can be increased up to a maximum of 10,000.
Please note, the maximum value of limit is 1000. Therefore, to retrieve >1000 items, you will need to use a combination of offset+limit.
For example:
limit=1000, offset=0
limit=1000, offset=1000
limit=1000, offset=2000
limit=1000, offset=3000 (...and so on)