Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| 1998 | 2000 | 2004 | 2007 | 2011 |
| --- | --- | --- | --- | --- |
| 1.5 | 3.0 | 11.0 | 18.0 | 30.4 |
| 51% | 43% | 38% | 33% | 33% |
| 60% | 76% | 98% | 92% | 96% |
| 51,000 | 59,000 | 100,000 | 181,000 | 272,400 |
| 1784 | 1454 | 949 | 1388 | 1691 |
| 35 | 25 | 9 | 8 | 7 |
Question:
What is the 1998 value if the 2011 value is 30.4?
Answer:
1.5