Table:
text: Mount Tambora
Aftermath
Table I. Comparison of selected volcanic eruptions
Eruptions Country Location_ Year_ Volcanic_Explosivity_Index Fatalities
Mt. St. Helens USA, Washington Pacific Ring of Fire 1980 5 00057 57
El Chichón Mexico Pacific Ring of Fire 1982 4–5 02001 >2,000
Nevado del Ruiz Colombia Pacific Ring of Fire 1985 3 23000 23,000
Pinatubo Philippines Pacific Ring of Fire 1991 6 01202 1,202

text: Mount Tambora
Aftermath
Table I. Comparison of selected volcanic eruptions
Eruptions Country Location_ Year_ Volcanic_Explosivity_Index Fatalities
Mount Vesuvius Italy Mediterranean 79 5 02001 >2,000
Hatepe (Taupo) New Zealand Pacific Ring of Fire 186 7 00000 ?
Baekdu China / North Korea Pacific Ring of Fire 969 6–7 00000 ?
Kuwae Vanuatu Pacific Ring of Fire 1452 6 00000 ?
Huaynaputina Peru Pacific Ring of Fire 1600 6 01400 ≈1,400
Tambora Indonesia Pacific Ring of Fire 1815 7 71001 >71,000
Krakatoa Indonesia Pacific Ring of Fire 1883 6 36000 36,600
Santa María Guatemala Pacific Ring of Fire 1902 6 07001 7,000–13,000
Novarupta USA, Alaska Pacific Ring of Fire 1912 6 00002 2

Question: How many years there is a location of the Pacific Ring of Fire and eruptions of Pinatubo under Mount Tambora?