I have a time series like this:

..85%
5.42%
7.90%
8.28%
3.83%
3.47%
6.03%
4.19%
6.71%
8.74%
6.03%
7.71%
8.75%
7.01%
2.87%
5.23%
4.89%
6.33%
6.50%
6.22%

Is there a a good way to predict what the next number is the time series
will be and what the standard deviation is ?

Thank you in advance.