pre_text: The following table shows the fair value of the DB pension plan assets for each category. Equity securities included approximately $15 million of BCE common shares, or 0.06% of total plan assets, at December 31, 2019 and approximately $8 million of BCE common shares, or 0.03% of total plan assets, at December 31, 2018. Debt securities included approximately $53 million of Bell Canada debentures, or 0.21% of total plan assets, at December 31, 2019 and approximately $68 million of Bell Canada debentures, or 0.30% of total plan assets, at December 31, 2018. Alternative investments included an investment in MLSE of $135 million, or 0.53% of total plan assets, at December 31, 2019 and $135 million, or 0.59% of total plan assets, at December 31, 2018. The Bell Canada pension plan has an investment arrangement which hedges part of its exposure to potential increases in longevity, which covers approximately $4 billion of post-employment benefit obligations. The fair value of the arrangement is included within other alternative investments. As a hedging arrangement of the pension plan, the transaction requires no cash contributions from BCE.
table: FOR THE YEAR ENDED DECEMBER 31 2019 2018
table: Observable markets data
table: Equity securities
table: Canadian 1,017 844
table: Foreign 4,534 3,770
table: Debt securities
table: Canadian 13,216 12,457
table: Foreign 2,385 2,004
table: Money market 219 327
table: Non-observable markets inputs
table: Alternative investments
table: Private equities 2,119 1,804
table: Hedge funds 1,001 1,014
table: Real estate 948 758
table: Other 91 93
table: Total 25,530 23,071
question: Analyse this data from a financial earnings document. What is the average Bell Canada debentures for 2018 and 2019?