Table:
|  | 2019 | 2018 | 2017 |
| --- | --- | --- | --- |
| Net income attributable to American Tower Corporation stockholders | $1,887.8 | $1,236.4 | $1,238.9 |
| Dividends on preferred stock | — | (9.4) | (87.4) |
| Net income attributable to American Tower Corporation common stockholders | $1,887.8 | $1,227.0 | $1,151.5 |
| Basic weighted average common shares outstanding | 442,319 | 439,606 | 428,181 |
| Dilutive securities | 3,201 | 3,354 | 3,507 |
| Diluted weighted average common shares outstanding | 445,520 | 442,960 | 431,688 |
| Basic net income attributable to American Tower Corporation common stockholders per common share | $4.27 | $2.79 | $2.69 |
| Diluted net income attributable to American Tower Corporation common stockholders per common share | $4.24 | $2.77 | $2.67 |
Paragraphs:
AMERICAN TOWER CORPORATION AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Tabular amounts in millions, unless otherwise disclosed)
18. EARNINGS PER COMMON SHARE
The following table sets forth basic and diluted net income per common share computational data for the years ended December 31, (shares in thousands, except per share data):
Question:
What was the change in Dilutive securities between 2018 and 2019?
Answer: 3201-3354 = -153