diff --git a/report.Rmd b/report.Rmd
index c1b012f..ddc5a38 100644
--- a/report.Rmd
+++ b/report.Rmd
@@ -318,8 +318,8 @@ The table below summarizes the response rates for optional top-level questions i
 The "Total Number of Species Planted" question has special handling—only responses greater than 0 are considered valid, whereas for other questions, any non-NA value counts as a response.
 
 ```{r response-rate-table-optional, echo=TRUE, message=FALSE, fig.height=6, fig.width=8}
-fields <- c("Planter Contact Email", "Funding Source", "Land Ownership", 
-            "Tree Size Planted", "Source of Trees", "Total Number of Species Planted")
+fields <- c("Planter Contact Email (Optional)", "Funding Source (Optional)", "Land Ownership (Optional)", 
+            "Tree Size Planted (Optional)", "Source of Trees (Optional)", "Total Number of Species Planted")
 calculate_response_rates(survey_data, fields, "Response Rates for Key Survey Questions")
 ```