Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_24066938_1 (pop_density_people_km_2 VARCHAR, member_state VARCHAR)

### Question ###
How many measurements of the Czech Republic's population density are recorded in this table?

### Accurate SQL ###

SELECT COUNT(pop_density_people_km_2) FROM table_24066938_1 WHERE member_state = "Czech Republic"