Find the proportion of values of `x`

that are `NA`

.

## Arguments

- x
A vector to check.

## Value

The proportion of values of `x`

that are `NA`

.

## See also

Other counting wrappers:
`count_diff()`

,
`count_in()`

,
`count_na()`

,
`count_out()`

,
`na_in()`

,
`na_out()`

,
`na_rep()`

,
`prop_distinct()`

,
`prop_in()`

,
`prop_out()`

,
`what_in()`

,
`what_out()`

## Examples

```
prop_na(c("VT", "NH", NA, "ME"))
#> [1] 0.25
```