Exhibit 12

STATEMENTS RE: COMPUTATION OF RATIOS

(Dollars in Thousands, Except Ratios)



|                                                                                                    |  |                              |        |  |      |   |        |      |  |   |        |  |  |      |        |  |  |   |        | 
|--------------------------------------------------------------------------------------------------- |  | ---------------------------- | ------ |  | ---- | - | ------ | ---- |  | - | ------ |  |  | ---- | ------ |  |  | - | ------ | 
|                                                                                                    |  | For the Year Ended March 31, |       
|                                                                                                    |  | 2018                         |        |  | 2017 |   |        | 2016 |  |   | 2015   |  |  | 2014 |       
|Net investment income                                                                               |  | $                            | 21,960 |  |      | $ | 22,422 |      |  | $ | 20,716 |  |  | $    | 19,897 |  |  | $ | 19,307 | 
|Add: fixed charges and dividends on mandatorily redeemable preferred stock                          |  |                              | 14,517 |  |      |   | 14,109 |      |  |   | 14,036 |  |  |      | 8,799  |  |  |   | 5,959  | 
|                                                                                                    |  |                              |        |  |      |   |        |      |  |   |        |  |  |      |        |  |  |   |        | 
|Earnings                                                                                            |  | $                            | 36,477 |  |      | $ | 36,531 |      |  | $ | 34,752 |  |  | $    | 28,696 |  |  | $ | 25,266 | 
|Fixed charges and dividends on mandatorily redeemable preferred stock:                              |  |                              |        |  |      |   |        |      |  |   |        |  |  |      |        |  |  |   |        | 
|Interest expense on borrowings                                                                      |  |                              | 4,034  |  |      |   | 3,540  |      |  |   | 4,154  |  |  |      | 3,539  |  |  |   | 2,075  | 
|Amortization of deferred financing costs and discounts                                              |  |                              | 1,468  |  |      |   | 1,875  |      |  |   | 1,908  |  |  |      | 1,329  |  |  |   | 1,024  | 
|Dividends on mandatorily redeemable preferred stock                                                 |  |                              | 9,005  |  |      |   | 8,683  |      |  |   | 7,963  |  |  |      | 3,921  |  |  |   | 2,850  | 
|Estimated interest component of rent expense                                                        |  |                              | 10     |  |      |   | 11     |      |  |   | 11     |  |  |      | 10     |  |  |   | 10     | 
|                                                                                                    |  |                              |        |  |      |   |        |      |  |   |        |  |  |      |        |  |  |   |        | 
|Total fixed charges and dividends on mandatorily redeemable preferred stock                         |  | $                            | 14,517 |  |      | $ | 14,109 |      |  | $ | 14,036 |  |  | $    | 8,799  |  |  | $ | 5,959  | 
|Ratio of earnings to combined fixed charges and dividends on mandatorily redeemable preferred
stock |  |                              | 2.5    |  |      |   | 2.6    |      |  |   | 2.5    |  |  |      | 3.3    |  |  |   | 4.2    | 

The calculation of the ratio of earnings to combined fixed charges and dividends on mandatorily redeemable preferred stock is
above. Earnings consist of net investment income before fixed charges. Fixed charges and dividends on mandatorily redeemable preferred stock consist of interest expense on borrowings, amortization of deferred financing costs
and discounts, dividends on mandatorily redeemable preferred stock, and the portion of operating lease expense that represents interest. The portion of operating lease expense that represents interest is calculated by dividing the amount of rent
expense, allocated to us by our Administrator as part of the administration fee payable under the Administration Agreement, by three.