Based on prior knowledge, we can analyze the relationship between the feature "Recency" (months since last donation) and the target variable "Did the person donate blood?". 

It is reasonable to assume that individuals who donated blood more recently are more likely to donate again, while those who donated a long time ago are less likely to donate again.

Here is the dictionary containing typical Recency values for each target class:

```json
{
	"yes": [2.0, 4.0, 1.0, 3.0, 6.0],
	"no": [15.0, 14.0, 18.0, 12.0, 20.0]
}
```

In this case, the "yes" key represents the target class where the person donated blood, and the "no" key represents the target class where the person did not donate blood.

For the "yes" class, typical Recency values could be 2.0, 4.0, 1.0, 3.0, and 6.0 months since the last donation.

For the "no" class, typical Recency values could be 15.0, 14.0, 18.0, 12.0, and 20.0 months since the last donation.