diff --git a/docs/markdown/LOADING.md b/docs/markdown/LOADING.md
index a654c00fa..8ae0adf07 100644
--- a/docs/markdown/LOADING.md
+++ b/docs/markdown/LOADING.md
@@ -73,11 +73,11 @@ If we have records as CSV files (time series data of vairables), we can read the
 
 As an example, we have records in "./japan.csv" as shown in the next table. (Data is from [COVID-19 Data Hub]((https://covid19datahub.io/).)
 
-| |  | confirmed | fatal | province | population | date |
-| -- | -- | -- | -- | -- | -- |
-| 0 | 966287 | 17979 | Illinois | 12671821 | 2021-01-01 |
-| 1 | 977677 | 18217 | Illinois | 12671821 | 2021-01-02 |
-| 2 | 982105 | 18322 | Illinois | 12671821 | 2021-01-03 |
+|    | confirmed | fatal | province | population | date       |
+| -- | --        | --    | --       | --         | --         |
+| 0  | 966287    | 17979 | Illinois | 12671821   | 2021-01-01 |
+| 1  | 977677    | 18217 | Illinois | 12671821   | 2021-01-02 |
+| 2  | 982105    | 18322 | Illinois | 12671821   | 2021-01-03 |
 
 We can read it with `DataLoader.read_csv()` method. Argument `parse_dates` (list of columns of dates) and `dayfirst` (whether date and month are formatted with DD/MM or not) are optional, but it is suggested to use them to read date information correctly. The read data is saved as a `pandas.DataFrame` and it can be checked with `DataLoader.local` property.
 
@@ -125,11 +125,11 @@ We can set variables using `DataLoader.assign()`. This use `pandas.DataFrame.ass
 
 Let's say, we have the following dataset as `loader.local`. We want to assign country name (string "USA") and the number of vaccinations as the total value of vaccinated_once and vaccinated_full. (Note that the values of vaccinated_once and vaccinated_full are not actual values. They are just simplified example values.)
 
-| |  | confirmed | fatal | province | population | date | vaccinated_once | vaccinated_full |
-| -- | -- | -- | -- | -- | -- | -- | -- |
-| 0 | 966287 | 17979 | Illinois | 12671821 | 2021-01-01 | 1000 | 500 |
-| 1 | 977677 | 18217 | Illinois | 12671821 | 2021-01-02 | 2000 | 700 |
-| 2 | 982105 | 18322 | Illinois | 12671821 | 2021-01-03 | 3000 | 800 |
+|    | confirmed | fatal | province | population | date       | vaccinated_once | vaccinated_full |
+| -- | --        | --    | --       | --         | --         | --              | --              |
+| 0  | 966287    | 17979 | Illinois | 12671821   | 2021-01-01 | 1000            | 500             |
+| 1  | 977677    | 18217 | Illinois | 12671821   | 2021-01-02 | 2000            | 700             |
+| 2  | 982105    | 18322 | Illinois | 12671821   | 2021-01-03 | 3000            | 800             |
 
 We can assign them as follows.
 
@@ -140,11 +140,11 @@ print(loader.local)
 
 Two columns will be added.
 
-| |  | confirmed | fatal | province | population | date | vaccinated_once | vaccinated_full | country | vaccinations |
-| -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
-| 0 | 966287 | 17979 | Illinois | 12671821 | 2021-01-01 | 1000 | 500 | USA | 1500 |
-| 1 | 977677 | 18217 | Illinois | 12671821 | 2021-01-02 | 2000 | 700 | USA | 2700 |
-| 2 | 982105 | 18322 | Illinois | 12671821 | 2021-01-03 | 3000 | 800 | USA | 3800 |
+|    | confirmed | fatal | province | population | date       | vaccinated_once | vaccinated_full | country | vaccinations |
+| -- | --        | --    | --       | --         | --         | --              | --              | --      | --           |
+| 0  | 966287    | 17979 | Illinois | 12671821   | 2021-01-01 | 1000            | 500             | USA     | 1500         |
+| 1  | 977677    | 18217 | Illinois | 12671821   | 2021-01-02 | 2000            | 700             | USA     | 2700         |
+| 2  | 982105    | 18322 | Illinois | 12671821   | 2021-01-03 | 3000            | 800             | USA     | 3800         |
 
 ## 3. Perform database lock