Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | January | February | March | April | May | June | July | August | September | October | November | December | Annual Additions(in millions) | Average Monthly Additions(in millions) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2002.0 | 0.28 | 0.35 | 0.41 | 0.28 | 0.29 | 0.35 | 0.36 | 0.49 | 0.37 | 0.53 | 0.72 | 0.8 | 5.23 | 0.44 |
| 2003.0 | 0.64 | 0.6 | 0.96 | 0.64 | 2.26 | 1.42 | 2.31 | 1.79 | 1.61 | 1.67 | 1.9 | 1.69 | 17.49 | 1.46 |
| 2004.0 | 1.58 | 1.6 | 1.91 | 1.37 | 1.33 | 1.43 | 1.74 | 1.67 | 1.84 | 1.51 | 1.56 | 1.95 | 19.49 | 1.62 |
| 2005.0 | 1.76 | 1.67 | 0.73 | 1.46 | 1.72 | 1.98 | 2.45 | 2.74 | 2.48 | 2.9 | 3.51 | 4.46 | 27.86 | 2.32 |
| 2006.0 | 4.69 | 4.28 | 5.03 | 3.88 | 4.25 | 4.78 | 5.28 | 5.9 | 6.07 | 6.71 | 6.79 | 6.48 | 64.14 | 5.35 |
| 2007.0 | 6.81 | 6.21 | 3.53 | 6.11 | 6.57 | 7.34 | 8.06 | 8.31 | 7.79 | 8.05 | 8.32 | 8.17 | 85.27 | 7.11 |
| 2008.0 | 8.77 | 8.53 | 10.16 | 8.21 | 8.62 | 8.94 | 9.22 | 9.16 | 10.07 | 10.42 | 10.35 | 10.81 | 113.26 | 9.44 |
| 2009.0 | 15.41 | 13.82 | 15.64 | 11.90 | 11.58 | 12.04 | 14.38 | 15.08 | 14.98 | 16.67 | 17.65 | 19.10 | 178.25 | 14.85 |
| 2010.0 | 19.90 | 18.76 | 20.59 | 16.9 | 16.31 | 17.98 | 16.92 | 18.18 | 17.1 | 18.98 | 22.88 | 22.62 | 227.12 | 18.93 |
| 2011.0 | 18.99 | 20.20 | 20.21 | 15.34 | 13.35 | 11.41 | 6.67 | 7.34 | 7.90 | 7.79 | 2.97 | 9.47 | 148.32 | 11.80 |
Question:
What septembers are 17.1 in December? 
Answer:
22.62