The fpp2 package comes with the a10 dataset, which is supposed to represent monthly anti-diabetic drug subsidy in Australia from 1991 to 2008. The plot given in the corresponding text matches the description and is highly seasonal. But this is what I am getting from the fpp2 package:
a10
Jan Feb Mar Apr May Jun Jul
1991 0.000000
1992 7.920884 9.219959 10.301813 11.613195 12.539031 14.087503 15.346418
1993 26.276099 29.068844 30.516766 32.776821 34.304273 36.672523 38.683060
1994 56.234311 60.176240 62.437087 65.692643 69.161984 72.807822 75.394568
1995 108.989384 115.955064 122.033019 130.895367 144.777168 158.121564 184.613574
Aug Sep Oct Nov Dec
1991 1.295276 2.269658 4.038592 5.514931 6.602400
1992 17.528669 19.089345 20.537184 22.334591 23.980902
1993 41.142395 43.590946 47.928078 50.264135 53.740141
1994 78.482364 82.562048 87.406545 93.068720 100.630282
1995 229.003120
The data runs only till 1995, and is non-seasonal.
> str(a10)
Time-Series [1:204] from 1992 to 2008: 3.53 3.18 3.25 3.61 3.57 ...
> tail(a10)
Jan Feb Mar Apr May Jun
2008 29.66536 21.65429 18.26495 23.10768 22.91251 19.43174
Perhaps you could uninstall and reinstall the package?