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:
| Name of place | Number\nof\ncounties | Principal\ncounty | ZIP code\nLower | ZIP code\nUpper |
| --- | --- | --- | --- | --- |
| Dacono | 1 | Weld County | 80514 |  |
| Dailey | 1 | Logan County | 80728 |  |
| Dalerose | 1 | Las Animas County | 81049 |  |
| Dallas | 1 | Ouray County |  |  |
| Darlow | 1 | Adams County |  |  |
| Dearfield | 1 | Weld County |  |  |
| De Beque | 1 | Mesa County | 81630 |  |
| Deckers | 1 | Douglas County | 80135 |  |
| Deepcreek | 1 | Routt County | 80428 |  |
| Deer Creek Valley Ranchos | 1 | Park County | 80470 |  |
| Deermont | 1 | Jefferson County |  |  |
| Deer Park | 1 | Routt County | 80467 |  |
| Deer Trail | 1 | Arapahoe County | 80105 |  |
| Delagua | 1 | Las Animas County |  |  |
| Delcarbon | 1 | Huerfano County |  |  |
| Delhi | 1 | Las Animas County | 81059 |  |
| Dell | 1 | Eagle County |  |  |
| Del Norte | 1 | Rio Grande County | 81132 |  |
| Delta | 1 | Delta County | 81416 |  |
| Dent | 1 | Weld County |  |  |
| Denver | 1 | Denver County | 80201 | 95 |
| Denver International Airport | 1 | Denver County | 80249 |  |
| Denver Merchandise Mart | 1 | Adams County | 80216 |  |
| Deora | 1 | Baca County | 81054 |  |
| Derby | 1 | Adams County | 80022 |  |
| Derby | 1 | Adams County | 80022 |  |
| Derby Junction | 1 | Eagle County |  |  |
| Derrick | 1 | Rio Grande County |  |  |
| Devine | 1 | Pueblo County | 81001 |  |
| Dick | 1 | Weld County |  |  |
| Dillon | 1 | Summit County | 80435 |  |
| Dinosaur | 1 | Moffat County | 81610 |  |
| Dinosaur National Monument | 1 | Moffat County | 81610 |  |
| Dinsmore | 1 | Pueblo County |  |  |
| Divide | 1 | Teller County | 80814 |  |
| Dixon | 1 | Larimer County |  |  |
| Dodd | 1 | Morgan County |  |  |
| Dolores | 1 | Montezuma County | 81323 |  |
| Dome Rock | 1 | Jefferson County | 80441 |  |
| Dominguez | 1 | Delta County |  |  |
| Dominion | 1 | Boulder County |  |  |
| Dorey Lakes | 1 | Gilpin County | 80401 |  |
| Dorsey | 1 | Sedgwick County |  |  |
| Dory Hill | 1 | Gilpin County | 80401 |  |
| Dos | 1 | Garfield County |  |  |
| Dotsero | 1 | Eagle County | 81637 |  |
| Dotsero | 1 | Eagle County |  |  |
| Dove Creek | 1 | Dolores County | 81324 |  |
| Dover | 1 | Weld County |  |  |
| Dowds Junction | 1 | Eagle County |  |  |
| Downieville | 1 | Clear Creek County | 80436 |  |
| Downieville-Lawson-Dumont | 1 | Clear Creek County |  |  |
| Downtown | 1 | Arapahoe County | 80110 |  |
| Doyleville | 1 | Gunnison County | 81230 |  |
| Drake | 1 | Larimer County | 80515 |  |
| Drakes | 1 | Larimer County |  |  |
| Dream House Acres | 1 | Arapahoe County | 80120 |  |
| Drop City | 1 | Las Animas County |  |  |
| Dry Creek Basin | 1 | San Miguel County | 81431 |  |
| Duban | 1 | Denver County |  |  |
| Dudley | 1 | Park County |  |  |
| Duffield | 1 | El Paso County |  |  |
| Dumont | 1 | Clear Creek County | 80436 |  |
| Duncan | 1 | Saguache County |  |  |
| Dunckley | 1 | Routt County |  |  |
| Dunton | 1 | Dolores County | 81323 |  |
| Dunul | 1 | Rio Grande County |  |  |
| Dupont | 1 | Adams County | 80024 |  |
| Durango | 1 | La Plata County | 81301 |  |
| Durango-La Plata County Airport | 1 | La Plata County | 81301 |  |
| Durango Southwest | 1 | La Plata County |  |  |
| Durham | 1 | Mesa County |  |  |
| Dyersville | 1 | Summit County |  |  |
| Dyke | 1 | Archuleta County |  |  |
Question:
how many low zip codes are there in total?
Answer:
40