​

Year Ended December 31, 

​

2024

2023

2022

2021

2020

Per share data:⁽¹⁾

​

​

​

​

​

​

​

Net asset value, beginning of period

​

$

13.63

$

14.30

$

15.10

$

15.23

$

15.23

​

Net investment income

​

1.60

1.84

​

1.60

​

1.36

​

1.18

​

Net realized and unrealized gains (losses) on investments and foreign currency transactions

​

(1.13)

(0.96)

​

(0.93)

​

0.07

​

0.37

​

Net increase in net assets resulting from operations

​

0.47

0.88

​

0.67

​

1.43

​

1.55

​

Distributions declared from net investment income

​

(1.79)

(1.55)

​

(1.47)

​

(1.56)

​

(1.55)

​

Net asset value, end of period

​

$

12.31

$

13.63

$

14.30

$

15.10

$

15.23

​

Total annualized return based on market value⁽²⁾

​

(21.30)

%  

(5.75)

%  

​

(15.81)

%  

​

13.89

%  

​

(0.66)

%  

Total annualized return based on net asset value

​

3.49

%  

6.20

%  

​

4.55

%  

​

9.21

%  

​

10.36

%  

Net assets, end of period

​

$

286,134

​

$

316,772

​

$

332,387

​

$

349,751

​

$

312,897

​

Per share market value at end of period

​

$

9.68

​

$

12.30

​

$

13.05

​

$

15.50

​

$

13.61

​

Shares outstanding end of period

​

23,243,088

​

23,243,088

​

23,243,088

​

23,162,667

​

20,546,032

​

Ratios/Supplemental Data:⁽³⁾

​

​

​

​

​

​

Ratio of expenses before incentive fees to average net assets⁽⁴⁾

​

14.89

%  

15.16

%  

12.54

%  

10.96

%  

9.78

%  

Ratio of incentive fees to average net assets

​

2.99

%  

3.25

%  

2.04

%  

2.30

%  

2.49

%  

Ratio of total expenses to average net assets⁽⁴⁾

​

17.88

%  

18.41

%  

14.58

%  

13.26

%  

12.27

%  

Ratio of net investment income to average net assets⁽⁴⁾

​

11.98

%  

12.98

%  

10.81

%  

8.81

%  

7.90

%  

Portfolio turnover ratio

​

30.93

%  

19.91

%  

35.81

%  

60.79

%  

35.86

%