Table:
aggregate income
percentage of income in t1 hpmf captured by t1 pmf

initial tax filers
initial tax filers
delayed tax filers
for initial tax filers
for all tax filers

billions of 2010 constant dollars
percent

employment earnings

1990
468.3
468.6
20.5
99.9
95.7

1995
465.5
465.6
14.0
100.0
97.1

2000
563.0
563.5
25.0
99.9
95.7

2005
621.5
622.4
25.6
99.8
95.9

2010
681.2
681.7
22.2
99.9
96.8

business self-employment

1990
11.6
11.9
1.0
97.1
89.9

1995
12.9
13.3
1.0
96.8
90.1

2000
19.0
19.6
2.0
97.0
87.9

2005
22.5
23.1
2.4
97.3
88.2

2010
23.3
23.5
1.8
99.0
91.9

employment insurance

1990
18.3
18.3
1.0
100.0
95.0

1995
16.5
16.4
0.6
100.0
96.3

2000
11.2
11.2
0.6
100.0
95.2

2005
13.4
13.4
0.6
100.0
95.5

2010
18.8
18.8
0.7
100.0
96.2

old age security

1990
15.1
15.1
0.4
100.0
97.7

1995
18.6
18.6
0.3
100.0
98.6

2000
21.4
21.4
0.2
100.0
99.1

2005
23.6
23.5
0.2
100.0
99.1

2010
26.9
26.9
0.2
100.0
99.2

total

1990
674.2
676.3
27.9
99.7
95.7

1995
706.1
707.6
20.5
99.8
97.0

2000
854.2
857.3
34.3
99.6
95.8

2005
932.3
934.8
35.6
99.7
96.1

2010
1,051.4
1,052.7
30.3
99.9
97.1

Statement: in 1990, the estimated sum of all ei payments to initial tax filers is $18.3 billion in the t1 hpmf.
Question: in 1990, what was the estimated sum of all ei payments to initial tax filers in the t1 hpmf?
Answer: [18.3]