Table:
occupation
1991
1996
2001
2006
2011

number
percent total
number
percent total
number
percent total
number
percent total
number
percent total

judges
345
14.0
485
21.0
620
22.0
695
25.0
1,095
36.0

lawyers and notaries
14,845
27.0
17,985
31.0
23,185
35.0
29,520
39.0
33,950
42.0

paralegal and related occupations
12,835
76.0
15,875
79.0
24,415
81.0
33,160
88.0
22,145
85.0

probation and parole officers
1,885
50.0
2,165
47.0
3,735
54.0
3,475
59.0
4,200
65.0

correctional service officers
3,960
22.0
4,455
24.0
5,415
29.0
6,285
31.0
7,250
32.0

sworn officers
3,965
7.0
5,635
10.0
8,275
14.0
11,210
18.0
13,600
20.0

Give a precise answer to the following question using only the table information. Return the answer in the JSON form {"answer": ["YOUR ANSWER"]}; for multiple items, use commas. '' is the caption of the table. Answer the following table-based question: When was it that 50% of probation and parole officers were women?

{"answer": ["1991.0"]}