Julia not able to convert Array to a series data for plotting

General Usage
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8

The last 4 rows seem to have non-numerical data. Could you double-check?

julia> y
424×4 DataFrame
 Row │ Italy    Germany  India     United Kingdom 
     │ Any      Any      Any       Any
─────┼────────────────────────────────────────────
   1 │ 2319036  1993892  10512093  3211576        
   2 │ 2336279  2015235  10527683  3260258        
   3 │ 2352423  2023828  10542841  3316019
   4 │ 2368733  2038645  10557985  3357361
   5 │ 2381277  2050129  10571773  3395959
   6 │ 2390102  2059382  10581823  3433494
  ⋮  │    ⋮        ⋮        ⋮            ⋮
 420 │ 281583   256433   4465863   355219
 421 │ Italy    Germany  India     United Kingdom
 422 │ 41.8719  51.1657  20.5937   55.3781
 423 │ 12.5674  10.4515  78.9629   -3.436
 424 │ missing  missing  missing   missing