## Warning: Removed 5 rows containing missing values
## (geom_point).
## Warning: Removed 1 rows containing missing values
## (geom_point).
## Warning: Removed 11 rows containing missing values
## (geom_point).
## Warning: Removed 5 rows containing missing values
## (geom_point).
## Warning: Removed 2 rows containing missing values
## (geom_point).
## Warning: Removed 8 rows containing missing values
## (geom_point).
## Warning: Removed 3 rows containing missing values
## (geom_point).
## Warning: Removed 4 rows containing missing values
## (geom_point).
## Warning: Removed 1 rows containing missing values
## (geom_point).
## Warning: Removed 1 rows containing missing values
## (geom_text).