diff --git a/data/data_raw_sites.csv b/data/data_raw_sites.csv
index 6a340d8..49aa6bc 100644
--- a/data/data_raw_sites.csv
+++ b/data/data_raw_sites.csv
@@ -1,7 +1,7 @@
 plot,site,plot_size,exposition,sand_ratio,substrate_depth,target_type,seed_density,survey_date.seeded,survey_date.2018,survey_date.2019,survey_date.2020,survey_date.2021,vegetation_cover.2018,vegetation_cover.2019,vegetation_cover.2020,vegetation_cover.2021
-L1_01,1,6,south,0,15,hay_meadow,4,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,80,70,70,70
-L1_02,1,6,south,0,15,dry_grassland,4,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,65,50,60,84
-L1_03,1,6,south,0,15,dry_grassland,8,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,70,60,82,50
+L1_01,1,6,south,0,15,hay_meadow,4,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,80,70,70,NA
+L1_02,1,6,south,0,15,dry_grassland,4,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,65,50,60,NA
+L1_03,1,6,south,0,15,dry_grassland,8,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,70,60,82,NA
 L1_04,1,6,south,0,15,hay_meadow,8,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,80,61,60,50
 L1_05,1,6,south,25,15,hay_meadow,8,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,31,60,70,70
 L1_06,1,6,south,25,15,dry_grassland,4,2018-04-27,2018-07-21,2019-06-26,2020-06-13,2021-07-05,50,70,80,90