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:
| IN No. | County Name | Establishment Date (SW Indiana) (History) (Statehood) | County Seat | Time Zone | Population (2010) (Rank) | Area sq mi (km 2 ) (Rank) | Twps | ZIP code Prefix(es) | % of Boundary by water |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 14.0 | Daviess | February 2, 1818 (10) (29) (14) | Washington | Eastern | 32,200 (6) | sqmi (km2) (3) | 10.0 | 475 | 55% |
| 19.0 | Dubois | December 20, 1817 (7) (20) (4) | Jasper | Eastern | 41,889 (3) | sqmi (km2) (4) | 12.0 | 475 | 24% |
| 26.0 | Gibson | April 1, 1813 (2) (8) (T) | Princeton | Central | 33,503 (5) | sqmi (km2) (1) | 10.0 | 475/476 | 59% |
| 42.0 | Knox | June 6, 1790 (1) (1) (T) | Vincennes | Eastern | 38,440 (4) | sqmi (km2) (2) | 10.0 | 475/478 | 84% |
| 51.0 | Martin | January 7, 1820 (11) (33) (18) | Shoals | Eastern | 10,334 (11) | sqmi (km2) (10) | 6.0 | 475 | 18% |
| 62.0 | Perry | November 1, 1814 (4) (12) (T) | Tell City | Central | 19,338 (9) | sqmi (km2) (8) | 7.0 | 474/475 | 52% |
| 63.0 | Pike | December 21, 1816 (6) (16) (1) | Petersburg | Eastern | 12,845 (10) | sqmi (km2) (9) | 9.0 | 475/476 | 35% |
| 65.0 | Posey | November 11, 1814 (5) (13) (T) | Mt. Vernon | Central | 25,940 (7) | sqmi (km2) (5) | 10.0 | 476 | 63% |
| 74.0 | Spencer | January 10, 1818 (9) (24) (9) | Rockport | Central | 20,942 (8) | sqmi (km2) (7) | 9.0 | 475/476 | 73% |
| 82.0 | Vanderburgh | January 7, 1818 (8) (22) (7) | Evansville | Central | 179,703 (1) | sqmi (km2) (11) | 8.0 | 476/477 | 26% |
Question:
When the % of boundary by water is 63% what is the overall number of zip code prefix(es)?
Answer:
1.0